All good (& nerdy) things happen in threes; that’s a fact. After my recently reinvigorated series on Croatia’s abandoned cropdustring airstrips had taken me to TWO newly reactivated runways in quick succession, I immediately thought to myself “well, this topic has peaked, no way something so cool will ever happen again”. But guess what: less than a month later, word reached me that yet another airfield had just been reopened, located barely 30 minutes away by Texan. No prizes for guessing what happened next!
So, you’re going along, minding your own business… driving down a country road you’ve gone down hundreds of times… expecting and suspecting nothing out of the ordinary… and then you round a corn field and see an airplane where no airplane has been seen for decades. 9A-UIX: confusing passing motorists since AUG 2025
Located just off the village of Nova Rača, the strip in question will probably be familiar to readers of the original article – if anything for being one of the most usable among the 12 I’d visited until then. A 595 x 10 m paved runway1 stretching in a 05-23 direction, it was built by PIK 5. Maj sometime in the early 70s (with 1973 being cited most often), and used primarily by An-2s and PZL Dromaders of PA Osijek (though Cessna 188s of PA Daruvar and Piper Pawnees of PA Zagreb made frequent appearances there as well). Following the violent dissolution of Yugoslavia in 1991, it would briefly serve as an actual “airbase”2, hosting militarized piston trainers and former PA cropdusters participating in the defense of the Bjelovar area (as one of the many improvisation efforts of the nascent, and woefully underequipped, Croatian Air Force).
The end of the Homeland War in 1995 would actually see a bit of life return to the airfield – albeit just as sporadic cropdusting and forestry operations that would go on few and far in between until 2008. After that, there would only be a one-of ultralight meet in MAY 2015, after which the runway would go completely dormant until 2025. Officially reopened on 08 SEP 2025 under the auspices of Aeroklub Nova Rača, there are no aircraft of any sort based there as of yet – so it became my privilege (and an honor) to do both the first official touch-and-go on 09 SEP… and then the first official full-stop landing on 17 SEP 🥳.
1 in the original article, I had listed the runway dimensions as 630 x 9 m; turns out, I was somewhat off the mark with that one. Despite having access to an unusual wealth of source material, detailed information about Nova Rača was curiously absent, forcing me to rely on measurement by Google Earth. The resulting error in length is primarily down to different references: whereas the official figure is just for the runway itself, my measurement had covered the entire paved surface end-to-end, including the 30 m apron. The error in width, however, is simply a consequence of trying to measure something super accurately on free-access satellite imagery
2 more precisely, the runway itself was used as a decoy; the airplanes (as well as command facilities and four 20 mm anti-aircraft guns) were actually located in a field about 300 m to the southeast, right on the edge of the forest visible in shadow in the photo above. Since surveillance radars of the Yugoslav Air Force could see aircraft taking off and landing somewhere near Nova Rača, the commanders of the Croatian defenses had hoped the opposing side would assume they were using the paved runway – and in case of an attack go straight for it, while avoiding the actual “base”. Indeed, exactly this had ended up happening on 03 JAN 1992, when a Yugoslav MiG-21 attacked the runway from an altitude of about 2,000-3,000 m, scoring only two ineffectual hits that did no damage to the pavement itself – apparently completely oblivious of the actual deployment on the forest’s edge
Despite some cracks along the edges (which increase in number towards the RWY 23 end), the state of the pavement is more than good – especially considering it’s 50 years old. Given that it was intended to support the 4.3 ton M-18 Dromader (which had the highest pavement loading in the entire PA fleet, even more so than the 5.5 ton An-2), the runway can easily handle any GA aircraft that could realistically use it in the future
The closeness of the road means that the displaced threshold (now in place of the old apron) is a must. Even so, on all of my approaches, I found myself coming in high and aiming for the second quarter of the runway to avoid startling the drivers below (the road is actually quite busy, despite what the photo would suggest!). While many of these strips were indeed built right next to roads for easier logistics (Korija and Čađavica too), their runways usually run parallel; Nova Rača and Čazma are the only examples that come to mind of a perpendicular arrangement
Unlike at Čađavica, there are no fixed close-in obstacles on either runway end, so you can come in and get out even in something with marginal performance (<cough> 60 HP Falke </cough>). However, like at Korija, thermal turbulence from the surrounding fields plays a large role… as does mechanical turbulence from the forest during any stronger southeasterly wind
An approach over trucks on one end, and over cornfields on the other… my kind of place!
It’s the classic story of the Phoenix: one ultralight burns down, and a new one soon rises from the financial ashes to take its place. Having lost their gorgeous TL Ultralight TL-232 Condor Plus D-MULL to a ground fire on 26 MAY 2025 (thankfully without any injuries), the three of my mates who had owned it all adopted a weapons-grade “shit happens” attitude, pooled their cash together once more, and set out to find a replacement – all within the span of just two months. If that’s not the proper GA attitude, I don’t know what is! 💪
Though another TL-232 was initially on the cards, in the event they went with a stunning B&F FK9 Mk. II TG called D-MRRP, which would become only the second of its type to ever be based in Croatia (the first one, OM-M483, actually being a temporary rental). As was the case with the old D-MULL, you could count on the fingers of one hand the number of days it took me to hop in and take it up for a spin…
Golden Hour with the boys… and airplanes
Funky
While it sounds tame compared to some of the other ones out there, the designation “FK9 Mk. II TG” actually contains quite a lot to unpack. The fun starts already with the 9 – for while it may be the design that had launched B&F as a company, the FK9 is actually the ninth aircraft penned by the company’s founder and chief designer, Otto Funk. Originally an engineering apprentice at the Heinkel works of Speyer, Germany (the place with the famous aeronautical museum), Mr. Funk had started designing gliders as a spare time passion project soon after joining the company in 1959. The first one out of the gate was the Greif 1a1, a striking all-metal V-tail single-seater that bore a strong resemblance to the contemporary Antonov A-15. Build using tools from Heinkel’s apprentice workshop, only one would ever be made (D-7142), despite its reportedly outstanding performance by the standards of the day. Its uniqueness would be further improved upon in 1960, when it would be rebuilt into the Greif 1b, now featuring a BMW 80262 turbojet engine in the lower fuselage for full self-launching and self-sustaining capability. You can probably see already where this article is going…
1 because it was built using Heinkel infrastructure, its formal name should actually be the Heinkel Greif Ia… though it would later be informally rechristened into the Funk FK1 Greif
2 a tiny 40 kg unit that could put out 450 N of thrust, this 1960 design was specifically intended to render winch launches and tow planes obsolete by allowing single-seat gliders to reach 7,000 ft in roughly 15 minutes, burning about 12-13 liters of Diesel in the process. Ironically for a “silent sport”, the 8026 spun at a very vocal 45,000 RPM, which was one of the reasons (cost being the primary one) why it failed to gain any traction.
Interestingly, the same setup was also used on the Hütter H30 TS, designed by the late, great Eugen Hänle. Whereas the Greif pioneered many metal construction techniques, the H30 would do the same for fiberglass; indeed, Mr. Hänle’s experience with crafting the design later helped him set up his own company, Glasflügel – whose H205 Club Libelle was the first glider (and first flying thing of any sort) that I have ever owned 🥰
Then in 1962 came the much improved, much more streamlined, and much much more elegant (albeit less turbojet-y) Greif II/FK2. Of this too only one example, D-7014, would be made; but unlike D-7142 (which was lost in an accident in AUG 1962), the II is still airworthy today, and regularly turns heads at any self-respecting vintage glider meet…
It took me awhile to realize that the Otto Funk who had designed the Greif II was the very same Otto Funk who had designed the FK9… well, better late than never! As was the case with the DV-22 Speed Katana featured in a previous post, I got to see the FK2 long before I could appreciate its provenance… though I did indeed appreciate its looks! Like the Greif I/FK1, D-7014 was also built at the Heinkel shop using Heinkel tools… so, if we were to nitpick, its proper name would have “Heinkel” at the front
1968 would see the appearance of the FK3, an 18 meter all-metal high-performance glider whose impact B&F themselves describe as “The high aspect ratio wings and the modern tapered fuselage were to leave their stamp on the design of modern gliders up to the very present”. That’s as maybe; what is more nerdilicious however is what happened in 1970 when Rhein-Flugzeugbau (RFB) turned the design into a motor glider by sticking a 40-ish HP engine3 driving an eight-blade ducted pusher fan mounted behind the cockpit. If that made you think Edgley Optica, you’d be on the right track; the Optica was indeed one of the designs that had learned valuable lessons from what would become known as the RFB Sirius I4. Another was RFB’s own Fantrainer, which took the concept into high-performance waters by scaling it up into a highly agile, 600+ HP5 advanced trainer for the military (a vid of which was kindly provided by spotting colleague Eddy Meštrović).
3 according to a number of sources, the Sirius I had been flown with a rather eclectic range of engines, starting out with a 48 HP Nelson H-63 two-stroke… then two Yamaha motorbike engines… and finally two 20 HP 163 cm3 Fichtel & Sachs KM48 Wankels. So that’s two-stroke flat four… four stroke inline two… and twin-rotor rotary… all rather understandable, given that the 70s were known for the widespread use of recreational drugs…
4 there was also the Sirius II, though it would be more commonly known as the Fanliner; think Fantrainer, but smaller, fixed gear, just 150 HP, and intended squarely for comfortable long-distance touring
5 the original Fantrainer 400 was powered by a 545 HP Allison 250-C20 turbine as seen in the Bell JetRanger helicopter; the subsequent Fantrainer 600 would switch to the improved C30, developing a juicier 650 HP
The real significance of the FK3 though was that it would become the first Funk design to enter any form of series production, with an 11-unit run undertaken by VFW-Fokker as the VFW-Fokker FK3. Don’t be fooled by the name change however; all of this was still happening at Speyer, VFW having absorbed Heinkel in 1965 before merging with Fokker in 1969.
Then there was the FK4 of 1970, another all-metal competition glider. The sole example made (D-KEUL) would this time be produced by the Academic Aviation Group of the University of Karlsruhe – mercifully shortened to just Akaflieg Karlsruhe6 – under the model name AK1. Its claim to fame was being the first high-performance glider to have a fully retractable powerplant, a 28 HP Hirth F10A1a two-stroke whirling a 1.3 m two-blade tractor prop that would fold backwards into the fuselage aft of the cockpit – a solution still used on virtually all modern self-sustaining gliders.
6 in 30s/40s/50s/60s/70s Germany, it was not unusual for these academic aviation groups to manufacture designs from up-and-coming engineers who had no production capabilities of their own. While many such machines had ended up being produced in small (or even token) batches only, some had actually managed to gain a proper foothold in this manner. Perhaps the best example is the Akaflieg MünchenMü-13, designed by “upstart” Egon Scheibe. Having been given a much-needed kick start, the Mü-13 would eventually evolve into the two-seat Bergfalke – which, when an engine was applied, would become the Motorfalke. Yes, the same one that would launch the SF-25Falke family, Europe’s most successful motor glider…
It took until the FK5 of 1979 for Mr. Funk to score his first real dud. Essentially an FK3 with the wings snipped down to 15 m (to make it fit into the more common and competitive 15 m Class), the prototype would reach 80% completion before being abandoned due to, and I quote, “company-specific reasons” at VFW-Fokker.
And then in 1985 came the FK6 – the first aircraft in this whole piece that actually has more than just a tangential connection to the FK9 💪. Its highlights include:
being Funk’s first proper ultralight (i.e. designed as such from the ground up, rather than being a conversion of a glider)
the first Funk design to use fiberglass instead of metal
and the design debut of Otto Funk’s son Peter, who would go on to have a significant part in the creation and evolution of the FK9
A single-seat parasol pusher somewhat reminiscent of the 1983 Aviasud Sirocco (albeit taildragging and with a fetching V-tail), the FK6 could boast very solid performance for its 30-50 HP, with a claimed cruise speed of as much as 120 km/h, and 750 km of range on just 25 liters of fuel. Despite reports of it being consistently superior to similar designs of the time (Sirocco included), the 6 was intended outright to be just an “attempt to build a lightweight construction using the newest technology“, so only three would ever be made:
D-MBBI, powered by a 31 HP Hirth F22 two-stroke
D-MTUD, sporting the common 50 HP Rotax 503 two-stroke
and D-MXOF, a dedicated glider tug with a 51 HP Rotax 462 (also two-stroke)
The design would also briefly reappear in 1994, when the Messerschmitt-Bölkow-Blohm (MBB) consortium developed it into the FK10, a slightly larger tandem two-seat model – though this would fail to gain any traction and remain as a one-of prototype (D-MTDD). And yes, you guessed it: MBB had taken over VFW-Fokker in 1981, so both the FK6 and FK10 were very much of Speyer origin!
Despite being just a testbed, the performance, reception and impact of the FK6 were encouraging enough for Funk Sr. to continue beavering away at the ultralight idea. Though the follow-on FK7 and FK8 would never leave the drawing board (and little to no information on them exists, save for being “FK6 derivations for amateur construction“), Peter Funk’s growing involvement would eventually bring this article back on track with the 1989 FK9… 🥳
On your Marks…
As it stood, the FK9 (then still without the Mk. I suffix) was an entirely conventional side-by-side tractor two-seater, similar in shape, size and layout to the contemporary Rans S-6 Coyote II. Offered only in tailwheel form, the majority would be powered by the Rotax 503, which made them good for 750 FPM in the climb and 135 km/h in the cruise at Maximum Take-Off Mass (MTOM). This compares favorably to another S-6 competitor from the time, the 1992 TL-132 Condor (the 232’s immediate predecessor), which could manage around 500 FPM and 130 km/h using the same engine – a difference that, while small, says a lot about 20+ years of experience in designing high-efficiency gliders, and a foreshadowing of what was to come with the later FK9 marks. More relevant to my Achtung, Skyhawk! sensibilities though was the existence of a handful of Mk. Is using alternate powerplants, either the run-of-the-mill 42 HP Rotax 447 two-stroke, or the very unusual 52 HP Wankel 814TG twin-rotor rotary – both another preview of the delightful nerdiness that awaits on the Mk. II 🥰.
However, while its Funk DNA did indeed give it an edge over its competitors, the FK9 was first and foremost a design intended outright for proper series production – which meant that, by necessity, it had to do away with some of the more avant-garde FK solutions for the sake of ease of manufacture. Whereas previous Funk designs were lovingly and painstakingly hand-crafted in apprentice workshops, the FK9 would have to be produced quickly and cheaply on a far larger scale by a conventional aircraft factory at Krosno, Poland, using whatever common (and/or easily obtainable) production tooling was at hand. Thus, Messrs Otto and Peter went down a more conventional route, employing:
a fuselage (designed by Peter) of steel tube at the front, and a mixture of steel and aluminium tubing from the cabin backwards, all wrapped in Ceconite fabric (except for the cowl, obviously)
and a wing (designed by Otto) built around aluminium spars and cabon-aluminium ribs also covered with Ceconite, with aluminium/Ceconite ailerons, flaps and elevators all mated to a control system taken from the stillborn FK8
Minus the prototype (D-MJKF, which the Funks had built in their own garage), 33 Mk. Is would be produced between 1992 and 1994, by which time the Krosno works would begin to prepare for the 1995 arrival of…
… the Mk. II
Essentially “just” an evolutionary development of the Mk. I, the Mk. II came about because the Funks wanted to make the design capable of accepting both a broader range of engines (as the 447 and Wankel options had already suggested) – and a broader range of power outputs. Changes to the structure were kept to the minimum necessary to accommodate a wider variety of engine mounts and associated stresses, and were actually fine-tuned “live” over the first 20 examples made. With anything between 45 and 80 HP now possible7, the Mk. II diverged into two regulatory versions, one with an MTOM of 400 kg, the other with 450, the applicability of which depended on the available power. The former limit applied if you went with our old friends the Rotax 462 or 503 and the 814TG… while the “full fat” 450 was available if you opted for the:
garden-variety 80 HP Rotax 912UL
its perennial competitor, the 82 HP Jabiru 2200
and the quite exotic Ecofly M160, essentially a Mercedes-Benz M160 0.6 liter turbocharged inline three out of the Smart ForTwo city car converted for aviation use. Depending on the version, the power output could be either 55 or 82 HP
Fascinated by this variety, I trawled a bit through the classifieds and various photo databases to try and see which of the above were actually used on real airplanes – as opposed to just offered on paper or submitted for the sake of legal documents. Unsurprisingly, the 912 took a clear lead, followed by the 503; the more powerful 582, interestingly, came in third, while bringing up the rear was the M160 – all but one in the more powerful M160/1 variant. No mention of the Jabiru, Wankel and 462.
7 despite the nominally low figure (with other aircraft of this class, such as the TL-232, regularly boasting 100 HP or more), the Mk. II’s glider heritage means that it makes excellent use of its power – so much so that the 912 model is even capable of being a rather capable tow plane. OK, heavy competition machines are beyond its capabilities… but stuff up to 580 kg MTOM is quite doable. Indeed, one flying club in Germany has successfully towed single-seaters such as the Schleicher Ka-6, Ka-8 and ASW19, the Grob G.102 Astir and the Neukom Elfe… and even some lighter twin-sticks, such as the very popular Schleicher ASK13 and the ubiquitous Let L-13 Blanik
The only other major difference was that the Mk. II was also offered with the option of a tricycle gear (w/ fully steerable nosewheel), aircraft so equipped receiving a TG suffix to their name. Indeed, the similarities between the two marks are such that I even found an instance of a Mk. I (D-MOKL) being converted into a Mk. II in 2006 by Otto Funk himself (and sporting a 55 HP M160 nicked from a later Mk. III; pure Achtung, Skyhawk! theater).
While it may lack the sweeping elegance of today’s Mk. VI, the Mk. II is not a bad looking machine – not by a long shot. Although the wing struts may appear to be inconveniently placed for entry into the cabin, getting in is surprisingly straightforward even for my (quite uncoordinated) 1.9 m: slide your backside into the seat from in front and simply pop your legs in… that’s it
Debuting already in 1997 on the coat tails of the Mk. II’s financial success, the Mk. III would realize the design’s “full Funk potential” by going nearly all composite (except the flight controls, which were still fabric covered). Other notable changes included redesigned vertical and horizontal stabilizers, as well as different control linkage for the ailerons and flaps (external links w/ internal mass balancing, the exact opposite of the Mk. II setup). Unlike the Mk. I and Mk. II, the performance and price differences between the II and III were such that both would actually be kept in side-by-side production for awhile due to customer demand. And on an entirely subjective note, the Mk. II’s cockpit feels narrower than the Mk.III’s… but also taller. Whereas in the latter I had to “keep a low profile” to avoid hitting my head against the upper crossbeams, in the former I could sit normally upright without issues – though, admittedly, this may simply be down to the design of the seats themselves and/or the thickness of their cushions
Return Of The Gästeflieger
As can be seen from the photos, D-MRRP itself is a pretty standard FK9 Mk. II TG, manufactured in 1995 with the serial 09 050. Up front there’s a normie 912UL driving an equally unremarkable (though very efficient) three-blade Woodcomp Propuls 174 ground-adjustable prop. Historically too nothing much stands out, save for a forced landing due to an engine failure in 2016, which resulted in the collapse of the nose gear and damage to the propeller, requiring their replacement.
Having relocated to its new home at Čakovec (LDVC) in mid AUG 2025, D-MRRP would immediately be put through its paces – not least of all by me, flying it in literal circles for minutes on end attempting to get a good cockpit shot… 😑
Fun is not a straight line… nor a particularly fast one, but I’m not complaining. One of the things that had immediately caught my eye was the airspeed indicator scale: goes all the way up to 180 km/h, but the yellow arc (above maneuvering speed/calm air only) starts at just a tad over 115. This, I suspect, may be due to the combination of a high lift wing and a lightweight main spar, making it rather easy to overstress with a full control deflection/any rapid increase in load at speeds higher than 120-ish km/h. Since it was a bumpy day with a lot of thermal turbulence – and I wasn’t really in a hurry to get anywhere – I decided to stick to conservative speeds and simply take in D-MRRP’s very elegant panel. A feature I particularly like is the tinted foil on the transparent roof panel, whose Visible Light Transmission (VLT) factor provided more than adequate ambient lighting (as seen here) without burning my scalp to a crisp
For us in-flight panel photography nerds, the FK9 has the same problem as virtually every other high-wing ultralight out there: you need to bank & bank some more to finally get the sun to illuminate the whole panel… however, the effort was worth it, particularly over water!
Though this may simply be down to my eye height (a consequence of being tall and insisting of squeezing myself into small airplanes), but I found the view out to be outstanding in nearly all directions, even in high angle-of-attack situations. More importantly, I could turn my head sideways without having to look at a door sill or the interior of the wing, which is definitely an A++ in my books! (and yes, I know the ball is not perfectly centered in any shot so far; the FK9 likes to wag its tail in turbulence and has a very touchy rudder – far more than any other UL I’ve flown – both of which took me a while to get used to)
A clean & tidy panel, with everything you really need; could stare at this for hours. There’s a Funke ATR833 com radio and a Trig TT21 Mode S transponder in there, with the rest of the electronics rounded out by a Kanardia Indu electromotor-driven altimeter and a TL Elektronic TL-8284 tachometer (though it is not used, and engine RPM is instead shown on the UL-MIP Flight Log). The one thing I really don’t care about is the Rotax throttle lever; you twist it left-right to fine-tune RPM – but for bigger and more rapid changes you have to press & hold the button on the top of the lever and then move it backwards & forwards. Trouble is, it moves in discrete steps (and holding the button for anything more than a few seconds is far from comfy), so ultra-fine power and rate control on landing is very difficult. As one of my colleagues would say, “an over-engineered solution to a problem that barely exists”
Another thing to get used to is the wheel brake lever, visible just in front of the left seat; it’s not the location that’s unusual so much as the fact that you have to push it forward to apply the brakes, a solution that I haven’t seen in any other ultralight so far (any brake lever is always pulled back). Some people also find the stick movements odd, since both are joined to a single shaft running through the tunnel between the seats – meaning they don’t pivot around a point in front of the seats, but rather to their side. To roll left you thus move the left stick left-down and the right stick left-up; while to roll right it’s right-up for the left and right-down for the right… i.e. the same sort of movement as a traditional yoke. With 25 years of experience on them, this movement felt perfectly natural for me… but I can imagine that glider and UL pilots, trained 99% of the time on conventional sticks, might find it disconcerting at first. Then there are the doors: you cannot fly with the doors open, but you can fly with them removed, in which case your max speed is limited to 100 km/h (to reduce twisting moments on the rear fuselage by the air rushing into the cabin, something that has cost many a skydive Cessna dearly!). Also note the choke lever on the left sidewall, which is essentially a gear shifter from a bicycle; sounds LOL, but actually makes a lot of sense, since its mechanism frees you from having to hold the choke lever continuously during start
Just flexing the glorious sunset a bit. Apart from its specific convex shape, a dead giveaway that you’re looking at an FK panel are the combined electrical/starting controls on the proprietary panel on the left. The main upshot is that you only need three switches to start the engine, all in line: Main Electrical ON, Ignition ON and Start PUSH (that’s if we ignore the boost pump switch on the right, and the electrical kill switch down by my left leg). On dual ignition engines (which all 912s are), the ignition switch turns on both circuits at the same time – but they can still be individually tested using the spring-loaded I-II switch (which kills the opposite side circuit when toggled)
Outside, the design is peppered with the sort of aerodynamic touches that leave little doubt its designers know their way around a glider. Some of the more conventional solutions include gap seals on the elevators, as well as ailerons that droop with flap extension (i.e. flaperons)… but there’s also more exotic stuff in there as well. For example, when fully retracted (at notch 0), the flaps are actually deflected upward by 10° (visible on the left flap), which significantly lowers the inner wing section’s angle-of-attack. This in turn means the speed of the airflow must increase in order for the wing to generate the necessary lift, allowing (and in fact “forcing”) the whole airplane to fly at higher speed in order to fly at all. Called negative flaps, this is a standard feature on high performance competition gliders – and one of the keys as to why this airplane does what it does on just 80 HP. The downside though is that the wing’s low speed performance tends to suffer, with a stall speed at notch 0 as high as 85 km/h – quite a high figure for a 450 kg aircraft with a large wing. Selecting the flaps to notch 1 gives a deflection of 0° and reduces the stall speed to 73 km/h… while dropping them down to the final notch (2) gives a 10° downward deflection and 68 km/h for the stall (just 20° of flap travel in total… absolutely shocking for a professional DeHavilland Canada/Bombardier driver!). Other noteworthy features visible here are the towing system mounting point below the tail (although the actual hook and release mechanisms are NOT fitted), and the single-point refueling port on top of the fuselage just above the second “R”, feeding two 20 liter tanks located just behind the seats
Both the Mk. I and II came fitted with a wing fold mechanism as standard. Disconnect the aileron and flap linkages, unplug the quick-release connector for the wingtip lights, remove a couple of safety pins – and then simply fold the wing back along the fuselage around a special joint on the rear spar. I’ve been told that an experienced operator could have the job done in as little as 10 minutes…
The centerpiece of the FK9’s performance is undoubtedly its airfoil, a modified Wortmann FX 62-K-153/20 designed for high-performance gliders – and already seen, used and proven on the FK3. Taking off with two of us on board and some 30 liters of fuel (thus maxing out the 450 kg MTOM), we saw an effortless 5 m/s | 1,000 FPM in the climb; during a go-around on a solo flight, I made the mistake of punching full power, with 6-7 m/s | 1,200-1,400 FPM registering on the vario, and acceleration so sudden and surprising I almost ended up with a flap overspeed; and in the cruise, when I found some smooth air and decided to try out 4,200 RPM (a low-to-mid range regime for the 912UL), 120-125 km/h were the figures I saw most often. This is particularly impressive given that I’d seen only marginally higher numbers on the TL-232 – which has 25% more power available – in roughly the same weather conditions, at roughly the same masses and with a very similar three-blade composite prop configured for climbing and hauling
I was quite smitten with the TL-232 when I first flew it… but I think the FK9 may have taken its crown; the airplane is an absolute riot (complicated throttle lever notwithstanding). Like D-MULL, D-MRRP will retain its German registration… and will eventually be refitted with the full glider tow setup
Speed is a tricky thing; not because it can kill you, but because it’ll complicate your life far more than it need be. Take my case for instance: for a bit of change, I recently swapped the 120 km/h SF-25 Falke motor glider for the 140 km/h Fly Synthesis Texan ultralight. Just 20 kph in it, that’s all; barely even noticeable on the sort of the distances common to continental Croatia… but I immediately started planning long(er) range flights like there was no tomorrow 🤨 (OK, much improved payload + better take off & climb performance + the ability to make a 180 turn in under 10 meters + more space inside had a lot to do with it as well… but mostly speeeeeeed).
Enticed by the prospect of finally visiting places that were beyond my physical (dis)comfort range on the Falke, it didn’t take long for my sights to land on two of Croatia’s 159 former cropdusting airfields that are still in use today: Korija near the town of Virovitica, and Čađavica near not-too-far-away Slatina (not the one in Romania). The problem, however, was that the Texan has a blue-tinted canopy and no convenient hatch to stick a camera out of (not to mention the wing is quite far forward, so the view down sucks), which meant Falke-style aerial reconnaissance was out of the picture (heh). Didn’t have my drone on me either, so a mix of ground shots and videos of the approach & landing was a self-selecting solution. Wasn’t expecting much in the way of quality as a consequence… but the end results actually came out quite solid – and, critically, good enough to use for another Cropdusting Airfields piece!
(spoiler alert: due to thermal turbulence on both flights, and the need to conserve fuel due to the Texan’s higher 100 HP burn, I ended up cruising at 125 km/h on average… so yeah, speeeeeeed)
Cropdusting strips are a vibe in themselves…
Korija (red) and Čađavica (green) with most of continental Croatia for scale. About 150-170 km in the realities of Croatian airspace from the Texan’s base at Mlinski kamen near Petrinja
Korija •RWY 01/19 • 600 x 20 m • very smooth & comfy
As it stands today, Korija sports a fairly unremarkable grass runway, whose only “claim to fame” is a noticeable 1% upslope in the RWY 01 direction. However, back in its heyday, it was essentially a 1200 x 150 m open field (whose outlines remain visible to this day), on which you could land wherever took your fancy.
Pocket history: served as a major base for cropdusting operations on behalf of PIK Virovitica (mostly with An-2s); opened sometime in the early 70s and operated until the run-up to the 1991 Homeland War; for many years afterward left mostly unattended (except for occasional mowing); and finally refreshed and reopened by the AK Virovitica flying club in the summer of 2024. It is currently registered as a “semi-private” runway (i.e. used solely by the club and aircraft based there, though PPR is possible), so it doesn’t have an ICAO Location Indicator… yet.
Is flat. Located at the heart of the region of Podravina – named after, and defined by, the river Drava – Korija is effectively the start point of the densest part of the whole PA cropdusting airstrip network. Of the 159 runways in total, 51 can be found in the 120 km between here and the confluence of the Drava and Danube (today’s border between Croatia and Serbia) – including also Čađavica, about 40 km E-SE of Korija as the crow flies
While the field itself doesn’t really have any vices (except for an abundance thermal turbulence, but it is hardly unique in that respect), if you wanted to be a good neighbor you’d definitely need to mind the village of Korija, located just 350 m off the RWY 19 end (and whose houses and church spire are faintly visible in the photo). Having shot a few touch and goes here as well, I certainly did put the Texan’s outstanding low speed maneuverability to good use on the upwind and crosswind legs!
On the other end, you have a fairly clear run, the first obstacles being the village of Golo Brdo and the foothills of the Bilogora mountain range some 1.3 km away. The only issue I can think of here are lorries on the dirt road running parallel with the runway, kicking up dust as they make their way to and from an under-construction express road about 800 meters out
Čađavica • RWY 02/20 • 470 x 15 m • half length OK, half length marginal
If, however, you found Korija too normal and conventional for your taste, don’t worry – I still got you covered 💪. On the face of it, Čađavica’s backstory pretty much mirrors that of Korija: built sometime in the late 70s… used by IPK Slatina and IPK Osijek (albeit primarily by PZL Dromaders)… abandoned in 1991… and left to rot for 30-odd years until the local government awarded an operator’s concession to a local father-son duo, who eventually brought it back to life in 2021. Same legal status, no ICAO Location Indicator.
What does stand out however – even by the standards of these strips – is its current configuration. Back in the olden PA days, Čađavica had a very comfy 620 x 15 m paved runway, with a large 150 x 25 m paved apron adjacent to the RWY 20 end; this would have been considered borderline luxurious at the time, and second only to Mirkovac near Osijek, whose 700 x 17 m runway with an apron at each end made it the queen of the network.
It’s 21st century incarnation though would see the runway shortened to 470 m – or the distance available from the RWY 02 threshold to the beginning of the apron. However, a pre-landing inspection pass also revealed that:
the first 200 m of RWY 02 were not in the best of shapes, with an uneven surface and lots of cracks – and while usable if need be, I personally wouldn’t venture there at speed without chunkier tires and a greater prop clearance than is available on the Texan
the final 200 m before the apron in the RWY 02 direction were surprisingly smooth, despite their visual appearance; pulled off a textbook greaser there
there’s a… hmm… “sub-optimal” earthen berm 20-ish m from the RWY 02 threshold; after climbing it on foot, I’d call it at about 5 m high… doesn’t sound like much, but clearing it on landing with a sufficient margin does mean that most of the threshold is unusable (even if it were in a good state to begin with)
Arriving with 02/20 hindsight. Even though the above realistically gave me “just” 300 m to play with, the combination of the Texan’s chunky low-speed wing, low mass, high flap and a helping headwind meant the landing was a complete non-issue; indeed, I actually had to ease off the brakes to avoid having to add power just to make the apron…
I’ve been at major GA airports with smaller aprons than this… at its peak, this would have easily been able to handle 5-6 An-2/M-18s and their attendant vehicles at the same time
View from the top… of the berm (which took a bit of work, given that it’s mostly fine earth). Don’t know why it’s here, but Google Earth historical imagery does not show it back in October 2024. Thankfully, the RWY 20 end is blissfully free of obstacles… and even Čađavica town is sufficiently far off (some 1.4 km) that you don’t have to worry about bothering the locals
And a bit of bonus content: one of only two CTSWs in Croatia, 9A-URV is actually a native of Čađavica… though obviously this was not taken there
After the meteorologically plainly useless spring of 2025 had gone, the arrival of more stable summer weather meant it was time once again to open up the map and see which airfield and which airplane I’d like to try out next 🤔. Having been on a bit of a Diamond roll lately (kick started by last year’s Alpine joyride in a Super Dimona), I decided I might as well focus on the ubiquitous DA-20 Katana, and try to get as many of its versions in as I could within a reasonable driving distance from home.
Naturally, this soon got me thinking about just HOW MANY of these versions there really are – which, in turn, sent me deep into my photo database to determine how many I’ve managed to snap over the years. Inevitably, this led me further on into my Croatian GA register, where I ended up counting seven that carry (or used to carry) the 9A prefix. Now, I’m no expert – but you have to admit that this sounds as gratuitous a reason to fire up Achtung, Skyhawk! as any…
Something’s wrong with the horizon… not the ADI, the real one
The Keyboard Is Mightier Than The Katana
But first, a bit of housekeeping. While most people use “DA-20” as a one-size-fits-all designation for the entire Katana family, the nerdy truth of the matter is that there’s quite a bit more to it than that. The story starts out in 1989 with the HK-36 Super Dimona touring motor glider (TMG), Diamond’s big rework of the earlier 1980 Hoffman H-36 Dimona. Available in many flavors – tailwheel/tricycle, 80-115 HP, naturally aspirated/turbocharged – the HK-36 had almost immediately become a runway success on the European market, with going on for 900 produced so far and at least one to be found in any Central European country.
Visual reference time: the original H-36(all of which were tailwheel, and most powered by the VW-derived 80 HP Limbach L2000)…
… vs the top-of-the-line HK-36TTC, 115 HP of turbocharged Rotax goodness
As was the case with another Austrian TMG manufacturer (HB Flugtechnik, but more on that in a later post!), this success had soon prompted Diamond to try and capitalize on its new market presence by turning the Super Dimona into a “conventional airplane” (i.e. something that would fit into the Single Engine Piston, or SEP, category). To this end, in 1991 the company would take a naturally aspirated 100 HP tricycle HK-36TC-100, snip its wings by five and a bit meters, add flaps to compensate for the loss of wing area… and call it a day. The resulting DV-20 Katana would even retain the motor glider’s wing joining system (which allowed for removal of the wings for storage or transport), as well as its notched elevator trim lever and characteristic panel with its raised radio cluster. Though the initial plan was to offer it with both the 80 HP Rotax 912A3 and the 100 HP Rotax 912S3 (both already seen on the HK-36), the A3 quickly dropped out of the picture, leaving the S3 as the only option.
HK-36 or DV-20? No way to tell really, same panel… (unless you look closely at the manifold pressure gauge and see the turbocharged 40 inch redline)
Unlike HB’s attempt though, the DV-20 worked; just as the Super Dimona had taken the market by storm a few years earlier, so did the Katana now. Indeed, already in 1993 – barely a year after series production had started at Wiener Neustadt in Austria – Diamond dropped a new version tailored specifically to the needs of the US market. Called the DA-20 Katana (or, more accurately, the DA-20A-1) – and intended from the outset to be produced at a new plant in London, Ontario – this model introduced a fair number of changes, including:
the 80 HP Rotax 912A3 as the only engine on offer (replaced from the 93rd airplane onward by the equally-powerful 912F3)
a simplified wing joint that was easier and cheaper to produce, but did not allow the wings to be removed so easily (fun fact, this made the center wing section under the seats significantly taller, which moved the seat base upwards… and in turn noticeably reduced headroom. Trust me, at my 1.91 m the difference is quite acute!)
a new, completely flat panel with a layout more similar to that of other US GA aircraft
an upgraded electrical system to cater for more avionics
an electrical elevator trim system with a rocker switch instead of the old mechanical setup
and a slightly different canopy with external handles (which, together with a different fuel tank cap, are the easiest ways to tell the DA and DV apart at a glance)
However, while Rotax engines are commonplace in North America today (thanks primarily to the ultralight and experimental boom of the 2010s), back in the mid 90s they were not really that big a thing, and support was not all that easy – nor cheap – to come by. To make the DA-20 even more US-friendly, in 1998 Diamond would swap out the 912 for the 125 HP Continental IO-240-B – whirling, for the first time on a Diamond, a fixed pitch prop – thus creating the DA-20C-1. Other changes included a larger fuel tank to cater for the thirstier engine (94 vs 79 liters), a higher Maximum Take Off Mass (800 vs 730 kg) – as well as a reduction in wing sweep by half a degree + relocation of the battery to behind the baggage compartment to compensate for the forward CG shift due to the IO-240’s higher mass. Originally called just the “Katana” and later “Katana Eclipse”, it would eventually diverge into three sub-models:
Eclipse: the full-fat touring machine, featuring two small side windows aft of the canopy for better visibility
Evolution: the bare-bones trainer, sans rear windows
Falcon: a military basic trainer with the primary and navigation instruments moved to the right seat, and a smaller fuel tank fitted to allow for increased payload (quite useful given the bulk of a even a basic flight suit)
So far, so straightforward… but no for long! 💪 Since the demand for the Katana kept growing – and Austrian production had wound down in 1996 after 160 DV-20s had been completed – many DA-20s had started making their way to Europe (including even a few C-1s). Their numbers had ended being so great in fact that they eventually pushed the DV-20 nameplate deep into obscurity – the reason, I suspect, subsequent Diamond designs all stuck with the DA prefix, despite being made at Wiener Neustadt. The A-1’s 20 HP deficit, however, was not to everybody’s liking (particularly in the hillier and/or hotter bits of the continent), leading Diamond to come up with the DA-20-100 Katana 100 package in 1998 – which was essentially just an overhauled A-1 factory refitted with the 912S3.
The fact that a convincing case for the DA-20-100 existed – and that DA-20A-1 production had ended in 1998 in favor of the C-1 – eventually convinced the company that there was still room in the market for the old Euro-spec DV-20. To address this niche, in 2006 Diamond would take the OG Katana, slap on Eclipse fuselage windows, stick in an Eclipse-inspired panel, and create what is often called the DV-20 NG (though formally it is still just the “DV-20”).
Croatia’s sole DV-20 NG zipping along back in 2012 when it was still brand new, its Eclipse fuselage windows showing proud…
Crisp, clean & classically correct. Note the “Dimona holdover” notched trim lever w/ fully mechanical linkage
More confusing though is the 2013 appearance of the DV-20E. Created at the behest of – and with input from – Austria’s Aviation Flight Center, it is touted a being a purpose-built VFR and IFR trainer, featuring the full Garmin G500 flight deck and the new fuel-injected (but still 100 HP) Rotax 912iS. Fine; however, a peek at its Type Certificate Data Sheet suggests that this may in fact be a US-spec Eclipse with Rotax power, featuring both the C-1’s 93 liter fuel tank and its 800 kg MTOM (neither of which are included on the DV-20 NG), plus a number of A-1/C-1 telltale physical features. To further give the impression that Diamond is out practicing its obfuscation techniques, this “AFC commissioned” configuration is offered to the average public as the DA-20i… so now we have an European designation being used for what looks like a US model, which is sold to one party under an Euro namplate, and to others under its US name… all while retaining European serial numbers 🤔.
And finally, for scheisse und giggles (as Jeremy Clarkson had put it), we also have to mention the DV-22 Speed Katana of 1996: the original DV-20 fitted with the turbocharged 115 HP Rotax 914F3 out of the HK-36TTC. However, unlike on the Super Dimona – where the extra grunt and altitude performance were used solely for hauling (gliders, not ass) – on the DV-22 the goal was explicitly overall touring performance. Yes, speed too (it says so in the name, with a 275 km/h cruise reported at 12,000 ft1), but also more fuel, payload and – critically – the ability to take them all even at higher temperatures and altitudes.
The latter was particularly important since the DV-22 boasted a 110 liter fuel capacity, now in the form of two 55 liter wing tanks instead of the standard single fuselage tank; indeed, one of the 22s is reported to have upped that to 129 liters for truly bladder-bursting endurance. The space freed by the deletion of the fuselage tank also made for a significantly larger baggage hold with a 30 kg capacity (10 up from the DV-20), and a practical fuselage cargo door for easy outside access. The MTOM too went up to 750 kg – which, while welcome, had managed to cover only 25 of those additional liters, and none of the extra baggage.
Even though overall performance was reported to be outstanding even in Mediterranean summer temperatures, the price increase (particularly on account of the engine) and inability to take a second person when full of fuel and baggage2 meant that the program would eventually go nowhere, and only two examples would ever be made – though both appear to still be flying as of July 2025…
1 this turn of speed however needs to come with a big *. The DV-22’s maximum design cruise speed (i.e. the beginning of the yellow arc on the Airspeed Indicator, which is a structural rather than performance limitation) is essentially the same as the DV-20’s: around 220 km/h. The Speed Katana had managed to achieve its cruise performance solely because the turbocharger allowed it to attain this maximum design cruise at significantly higher altitudes than the DV-20, where the difference between Indicated Air Speed and True Air Speed became significant. Using the rule-of-thumb of a 2% increase for every 1000 ft, a 220 km/h IAS at sea level neatly works out to a 275 km/h TAS at 12,000 ft…
2 with an empty mass of around 510 kg (no precise data is available since only two prototypes were ever made, and both were slightly different), a 750 kg MTOM leaves just 240 kg of load to play with. 110 liters of Mogas works out to around 85 kg; an average person, fully clothed with headphones, charts/tablet and such is probably around 90 kg; a full load of baggage is 30 kg. All this together works out to 215, leaving just 25 to spare
The second of the two – wearing the title “A Girl’s Best Friend” – roasting on the superheated turf of the now-defunct Unije Airfield (LDPN). The first and only time I’ve ever seen a Speed Katana in the flesh – and, sadly, at the time too ignorant of its provenance to fully appreciate it. If the model’s vivid paint is not enough of a clue, the two DV-22s can be easily recognized by their three bladed props, the only members of the Katana family to ever use them. Also note the cargo door above the wing trailing edge
In addition to all the tell-tale physical differences discussed above, a more subtle recognition feature of the various Katana models are the serial numbers themselves:
20.001 – 20.160: the original DV-20 series (1992-1996)
20.201 – 20.218: the DV-20 NG (2006-2013)
20.E001 and above: the DV-20E/DA-20i (2013-)
10.001-10.331: the original DA-20A-1 (1993-1998); the DA-20-100s, being a rework of existing A-1s, have no unique serials
C0001 and above: DA-20C-1 (1998-)
22.001 and 22.002: the sole DV-22s made (1996)
Swordfight
So, with the preliminaries now done, back to the main event! The (hi)story of the Katana in Croatian service can broadly be defined through two main factors: Yugoslavia and “business incompatibilities” – neither of which make for particularly light reading, and both of which continue to be a source of headache even now in 2025.
The first traces its roots back to the 60s, when Yugoslavia – fresh out of recovery from the chaos of WW2 – began looking to jump-start its light aviation sector. Even though the country had been designing and building its own airplanes ever since the 30s, the quality of the designs often left something to be desired, while production capacities were so constrained and the lines so outdated that a 100 airplane run could be considered a feat on par with the Ford Model T. The quickest fix was to buy in large numbers of proven Western designs; as well as solving the immediate problem and acting as a stop-gap until the local industry caught up, this sort of approach could also open the door to using Western tech in future airplanes (which did indeed happen), design collaboration with Western companies (that too) and even licensing deals (most notably for the Rolls-Royce Viper turbojet and Sud Gazelle helicopter). Bonus points were also awarded for fitting snugly into the (occasionally delicate) balancing act between East and West that was at the heart of non-aligned Yugoslavia’s foreign policy.
Reims Cessnas, Pipers, Bells… even Bellancas… poured in by the dozens. By the beginning of the 80s, every proverbial village in the country had a flying club with at least one Cessna 172 or Piper Warrior… some even with a Citabria, many more with glider-towing Super Cubs. “State organs” had gotten in on the action as well; the late 60s saw the formation of the first police air wings using Bell 47s (starting a Bell connection that continues to this day), while tending to Croatia’s huge crop fields involved Pawnees, Pawnee Braves and Cessna 188s in numbers to almost rival the country’s An-2 and PZL Dromader fleets. Post and newspapers were being flown nightly by Rockwell Commanders to all corners of the land, while domestic manufacturers were enthusiastically leafing thorough the FAA’s FAR 23 in preparation for designing the next generation of Yugoslav aircraft to full Western standards. It all looked and felt very promising.
By the late 70s though, things had started to go awry; OK, to be fair, “awry” may be too strong a word (since the country was flying, and flying a lot), but the long-term goal definitely became a victim of the short-term fix. The anticipated “take-off” of the local light aviation industry became just a hop down the runway, with the only worthwhile attempt – the Utva U-75 – topping out at just 138 examples made (and many of those were for military use). This was partly because the whole aeronautical industry had shifted toward designing and making proper military aircraft – such as the Soko G-2 Galeb trainer (which holds the Yugoslav Aviation Industry High Score at 239 made) and the Soko J-22 Orao ground attack aircraft (later to become the first Yugoslav design to exceed the speed of sound) – but mostly because the Cessnas and the Pipers and the Bellancas were simply doing too good a job. With such availability, support, quality and reliability (not to mention nearly unfettered access to the government’s purse for lifetime support), there was simply no incentive to go and burn massive resources in trying to make something better – especially if you had already burned yourself trying to do just that.
It was against this very background that the Katana (and many other modern designs) had to struggle once they finally arrived onto the Croatian scene following the end of the 90s independence war. The collapse of Yugoslavia in 1991 had seen many flying clubs and schools retain the aircraft they’d received in Yugoslav times – “generational hand-downs” that had in many cases been in their care ever since the 70s. For all intents and purposes completely free (i.e. paid for decades ago by a now-dead regime), and with their strengths and weaknesses known down to the last bolt, they were simply too good and convenient an option to warrant risking with, and actually paying for, “some Austrian plastic thing with a lawnmower engine”. Dad’s old Cessna 150 would do just fine… because it always had.
This time round though, things had started going awry for real. By the early 2000s, the economy was still in rough shape; the gov’t purse now had a thick lock on it; the airplanes themselves were not getting any younger; none of them had been upgraded since the 80s; fuel costs were inexorably on the rise… and then, two minutes to midnight, people suddenly started noticing that the plastic lawnmower was not that bad at all. Efficient, frugal, modern, comfortable… by that time proven as well… and the manufacturer as close as four hours away by car.
These very issues – plus the shift in perception – had been noticed by said manufacturer as well. Already in 2004, Diamond began actively trying to expand its presence in the country, first by registering a trio of demo aircraft on the Croatian register (DA-20A-1s 9A-DAI and 9A-DAK, and a Lyco-powered DA-40-180 9A-DAR) – and then even moving towards setting up composites manufacturing at Varaždin (LDVA) in the north of the country. Diamond events all over… Diamond participation in air shows… a Diamond flight school… even the fondly-remembered Diamond Cafe at Varaždin… all precursors to a long-term goal of setting up a full-scale full-aircraft manufacturing operation (with the likely endgame of transferring DV-20 NG production from Wiener Neustadt to focus on the DA-40 and 42). And in the midst of all of that, the other factor hit: “business incompatibilities”.
DAR and DAI under a depressing sky at the 2006 Croatian International Airshow Varaždin (and no, the photo is NOT monochrome!)
A veiled, vague and obviously diplomatic term, but it will have to do – since going in any deeper would involve bogging down in the happenings of 2000s Croatia, which is not really what Achtung, Skyhawk! is about. Suffice to say that Diamond and the local authorities couldn’t really see eye-to-eye on the manufacturing works; indeed, things reached a point in 2008 where Diamond felt the need to invite a bunch of us journalists to Wiener Neustadt to see “what Croatia was missing out on” – and for the then-head of the company, Christian Dries, to tell his side of the story directly on his home field.
A serious man talking about serious things… ooooh look, a prototype airplane! I may have physically been 23 at the time… but since this was my first proper factory tour, mentally I was closer to 13…
The exact reasons be what they may, their effect soon became obvious: in 2010, Diamond would pull out of Croatia completely, shelving any plans to set up shop here for the foreseeable future. With the possibility of elegantly supercharging Katana (and Star) sales throughout the region now gone, championing them as worthy replacements for Dad’s old C150 (and C172) effectively boiled down to just the initiative, needs and fiscal math of private owners and flight schools…
The Seven Samurai
To true avgeeks however, Diamond’s departure will quickly raise a different and altogether more important question: whatever happened to DAI and DAK? A line of inquiry I very much approve of, and can for once provide a meaningful answer to 🥰.
The older of the pair – and the oldest Katana to have ever served in Croatia – DAI was manufactured in 1995 with the serial 10.035. There aren’t many traces of its history before coming to Croatia in the summer of 2004, but it appears to have carried the reg C-FUJE at some time in the late 90s. It would serve as the company demonstrator and in the company’s flight school all the way until 12 SEP 2008, when it would suffer a power loss and go down in a cornfield near the town of Novi Marof; both of the crew would survive, albeit with significant injuries. The wreck, surprisingly intact given the terrain, would be shipped back to Wiener Neustadt, and later used as a training tool for advanced maintenance and repair courses.
“Fresh off the boat” from Austria – and very likely the only opportunity to see it “naked” in all-white. Already the following month, it would receive the classic “Diamond House Colors” blue stripes (photo by long-time spotting colleague Tomislav Muić over at Airliners.net)
Whereas DAI was from the front of the A-1 queue (the 35th off the line), DAK3 came all the way from the back. Manufactured in 1998 with the serial 10.323, it was one of the final A-1s made before the Ontario plant switched fully to the C-1 (10.331 would actually be the last one). Intended outright for delivery to Europe, it would initially be known as D-ETRY, before making its way to Diamond in Austria as OE-VPZ (an interesting reg given that the V stands for Versuchsflugzeug, or “development aircraft”, and is the default convention for prototypes and test machines).
Joining Diamond Aircraft Croatia soon after its formation – and engaged in the same sort of stuff as DAI – DAK would stay here all the way until Diamond closed up shop. However, instead of going back to Austria, it would be bought outright by one of the very locals who had learned to fly on it. The first (and nowadays only) privately-owned Katana in Croatia, in 2021 it would also become the first one I’d ever get the chance to fly, when a colleague from the Q400 (who had been an instructor on the DA-20) took me up for a very fun introductory flight…
3 the gap in regs, in case anyone’s wondering, is because 9A-DAJ was already taken by a 1972 Reims F150J based out of Grobnik (LDRG) (one of those old Yugoslav holdovers)
An 80 HP Katana vs 320 turbocharged Aussie horses… even with a former MiG-21 pilot at the controls, there’s simply no escape!
A classic Katana quarter-profile shot. This exact scheme was also worn by DAI after August 2004
One of the things the Katana does almost flawlessly – for a mass-produced tractor configuration aircraft – is the view forward. Coming off two decades of hard-to-see-out-of Cessna 150s and 172s, the Katana’s cockpit lines and the huge canopy were an absolute revelation (and don’t worry, I wasn’t landing and taking photos at the same time; PF was my colleague, who took the opportunity to give himself a right-seat refresher)
While Diamond itself may have left, the “Diamond Effect” had however remained. Four years of Diamond Aviation Training’s successful operation had shown the locals that there was another way – and that the Katana could indeed work as a C150 replacement if you used it properly. Yeah, sure, it was made out of a material that many oldtimers misunderstood and feared… yes, despite its near-constant expansion, Diamond was still a minuscule player compared to Cessna… and granted, the Katana’s 6000 hour check was nothing to sneeze at. But, at the other end of the scale, it flew beautifully; it was far more comfortable with two people on board; the extensive glazing made life in the congested airspace of a busy airfield so much easier; and it removed the manual mixture (which was never taught properly in local flight schools) and replaced it with something much more useful for an eventual move to a complex aircraft – the constant speed prop. Critically, unlike the Cessna 150 – or The Big Three’s other two-seat trainers, the Piper PA-38 Tomahawk and lookalike Beech 77 Skipper – the Katana was still very much in active production, and could be expected to remain so for at least a decade.
Then there was also the nitty-gritty business of hourly operational costs: for roughly the same payload and roughly the same straight-line speed (but better climb performance), the Katana drank half the fuel of the C150 – fuel which itself was (and remains) roughly half the price of Avgas. As in the US and Canada, by the 2010s the Rotax 912 had too ceased to be an exotic mystery and became commonplace – so even its maintenance would no longer be an organizational or financial hurdle. Simply put, if you were a pure training-only operator who could employ the airplane full-time (as opposed to a flying club with sporadic member use), and you could afford the Katana’s initial asking price, the see-saw of choice had suddenly become tilted very firmly AWAY from the trusty old C150.
This, in a nutshell, was the process that led to the appearance of Croatia’s third Katana, the previously mentioned 9A-DIG. Manufactured in 2011 with serial 20.207 (making it only the 7th NG made), it was bought new straight from the factory by the Croatian Aviation Training Center (HZNS) – and quickly put to use for initial flight training, helping to reduce the strain on the organization’s three-strong C172 fleet, and release them for more time-consuming IFR duties.
Revving up for a solo cross country flight. Another way to tell the DA and DV apart is the landing light; the DV has a single unit on the left side of the cowl, whereas the DA has twin landing/approach lights on the left wingtip. Funnily enough, the DV-20E/DA-20i also has the wingtip lights…
Other operators soon followed; what would later become the country’s second major training provider – Pan Aero – went the same route in APR 2013, albeit opting for three second-hand examples that would form the mainstay of its fleet. Alphabetically the first is 9A-PAA, a 1996 DA-20A-1 with serial 10.193; slightly more complicated life on this one, initially N693DA, then C-GFTO, then a hop across The Pond to become D-EULE, and then finally 9A-PAA…
DA and DV together. Back in 2013, issues with the usability of Lučko (LDZL) – the HZNS’ main base – often forced the entire fleet to disperse to Zagreb Intl (LDZA) and Varaždin. Since this also incurred a considerable loss of training time, delays in the schedule were compensated by renting in Pan Aero’s machines, hoping sheer numbers would have an effect before the winter weather set in…
No. 2 was, rather unsurprisingly, 9A-PAB, another 1996 DA-20A-1 with the serial 10.161. Having led an equally busy life – N851DF, C-GCVV and D-ETTC in succession – it would join the fleet already in AUG 2013.
It’s really hard to find an angle that doesn’t flatter the lines of the Katana…
PAB before PAB was even PAB. Snapped on 15 AUG 2013 literal minutes after its arrival at Zagreb on the last leg of its delivery flight. Ah, the luck of being in the right place at the right time… entirely by accident…
No. 3 though would arrive only a couple of years later in 2018, becoming 9A-PAE4 in the process. Also of 1996 vintage with serial 10.152 – thus making it the oldest Katana currently flying in the country – it too had several previous identities, including C-GKAH, G-BXHJ, F-GOCG and latterly SP-CAN.
4 the two letters skipped were being used by Pan Aero’s own Cirrus SR-20 (9A-PAC, later sold as G-FREY) and Beech 76 Duchess twin (9A-PAD, later sold to HZNS to replace its written-off Piper PA-44 Seminole)
Despite having been in the country for seven years at the time of writing – and our paths having crossed in the air more than once – I am ashamed to admit that I do not have a single photo of PAE… hence me borrowing one from another spotting colleague – Branko Češljaš – hosted on Jetphotos.com
And finally, the most characterful for last 🥳. For awhile the second (of two) privately-owned Katanas in Croatia, 9A-NIR does not appear to be much on the surface: a standard 1995 DA-20A-1 with serial 10.064, and a pedestrian blue stripe scheme that you could easily lose on a busy apron. Even its pre-Balkan life was relatively humdrum: N844DF until 1999, and then OE-AAA (cool reg btw) until MAY 2008.
Had it not been for the 9A-Nxx reg (there having been only one other aircraft in that range since the creation of the 9A prefix in 1992, the 1979 Reims F172M 9A-NOR), I would have likely walked right past it. OK, maybe not; with its crisp, shiny and freshly applied coat of paint, it did tend to catch the eye, particularly among all the usual weathered and tired Lučko residents…
At that time it would be sold on to Bosnia, where it would become T9-MIA (and then E7-MIA when the country switched prefixes in AUG 2008) of the little-known operator “Međugorje Airlines”. Based out of Mostar (LQMO) and taking its name from the eponymous town (in)famous for its apparitions of the Virgin Mary, this outfit was formed to take advantage of the tourist boom generated by constant pilgrimages – likely to the tune of taking people on panoramic flights over the major pilgrimage and apparition sites.
However, already by MAR 2009, E7-MIA would appear at Lučko for heavy maintenance – and then, through a chain of events that is not entirely clear (nor particularly transparent), end up staying here rotting away for the next four years…
First encounter in some truly terrible lighting conditions (made worse by my truly terrible camera work). The red spinner and partial stripes are remnants of the scheme it had worn as OE-AAA, the stripes having stretched back all the way till the rudder
M.I.A. … almost literally. Though it did appear looked after for quite awhile (at least with the minimum of effort), the fact of the matter was that it would take SEVEN years for it to finally move under its own power again…
In 2013, it would be de-registered from Bosnian books, bought by two local flight instructors – and then sent off to one of the very best mechanics in Croatia for a thorough overhaul (nuts and bolts upward). Emerging in 9A-NIR form in 2015, it was lauded as the best classic Katana in the country by all who flew it, with praise heaped on everything from the purring engine to the lack of play in the controls, the silky smoothness of the bearings, pulleys and cables – and even the bang-on rigging of the surfaces, controls and trim tabs (sadly, this was well before my time on the DA-20 😭).
Intended outright for long-term lease to flight schools, it would spend several years in the HZNS fleet, before eventually being made redundant once their operations had stabilized and student numbers dropped. With more work nowhere else to be found – Pan Aero being in the process of adding PAE, and no other professional training organizations existing elsewhere in Croatia – in 2018 the owners were forced to make the decision to sell. Thankfully, an airplane of this technical caliber had no trouble finding willing buyers, quickly becoming OM-KLA of Slovakia’s Seagle Air – where it is still happily (and very intensely!) flying as of JUL 2025…
Katanas in Croatia – summary:
9A-DAI • DA-20A-1 • 10.035 (1995) • crashed/returned to factory as wreck
9A-DAK • DA-20A-1 • 10.323 (1998) • operational
9A-DIG • DV-20 (NG) • 20.207 (2011) • operational
9A-NIR • DA-20A-1 • 10.064 (1995) • sold, became OM-KLA
9A-PAA • DA-20A-1 • 10.193 (1996) • operational
9A-PAB • DA-20A-1 • 10.161 (1996) • operational
9A-PAE • DA-20A-1 • 10.152 (1996) • operational
Other Diamonds in Croatia – historical summary:
9A-DAR: Diamond’s demo DA-40-180 • 40.258 (2003) • returned to Austria following Diamond’s withdrawal, later became D-EYZE with the European Flight Academy
9A-DME: the country’s sole Thielert-powered DA-40D • D4.218 (2006) • sold at some point, becoming S5-DOD
9A-ING: a private DA-40-180 • 40.245 (2002) • still flying in Croatia
9A-VIO: a brand new DA-40NG • 40.N652 (2024) • owned and flown by a Diamond distributor in Croatia
SE-MAD: a very busy DA-42 • 42.203 (2007) • privately owned and based at Varaždin despite the Swedish reg
If you’ve ever wanted to send the ex-Yugoslav aviation scene into a fit of fond nostalgia and blind rage at the same time, there was only one aircraft you’d need to mention: the Utva U-75. Behind its facade as a rather conventional two-seat basic trainer, it had over the years evolved into one of the most polarizing aircraft ever made by Yugoslavia’s aviation industry, a rough but capable diamond to some – and a vile deathtrap to others. While the truth is inevitably somewhere in the middle (and requires quite a bit of historical context to place), the fact remains that even today the type is very firmly ingrained in the local aviation psyche.
This, in turn, meant that it was only a matter of time before it would start appearing in force here at Achtung, Skyhawk!. Indeed, back in 2017 there was a big piece on the sole surviving four-seat U-75A, followed up a year later by an attempt at making a sensible (!) pilot report for my first ever flight on one. And while their mention here is a shameless plug (💪), they are nevertheless worth a read on their own merits… if anything for providing at least some of the aforementioned context, and helping to illustrate just what the U-75 was supposed to be and why it ultimately succeeded/failed at that.
All of this is also relevant for what is to come now. What had originally started out as just a simple photo showcase of the U-75s I’ve flown so far had, shockingly, gone completely off the rails within minutes. I’d needed only a few catchy captions to go along with the photos… but ended up going ona number of lengthy tangents, each delving deeper and deeper into the juicy, nerdy details of the U-75’s design and operation. Thus, having even a bit of the type’s backstory at hand will make it much easier for this whole (rambling but hopefully interesting) text to fall neatly into place…
A manly man’s stick with a guarded weapon release switch, and a 70s green ergonomic mess of a panel… who could honestly say no?
The origins of this thing go back to the summer of 2022, when – in an entirely unscripted series of events – I had managed to log time on three different U-75s in three different countries all in the space of just three months’ time. What had set the ball rolling was an innocent decision in June to add another new reg and another new airfield to my logbook. While browsing through available fields within reasonable reach by car, I stumbled upon Prijedor (LQPD) just over the border in Bosnia, whose Facebook page had prominently featured its U-75 E7-PDC in all its galleries. Tick. Having posted photos of that flight on my Instagram account, I was then contacted by an instructor from Maribor (LJMB) in Slovenia, and invited to have one last go on their S5-DCI before it used up its remaining service life and ended its flying career. Tick again. And, having done all of that, I thought “sod it”, and on an impromptu vacation to North Macedonia in September decided to go for a Triple Tick and try out Z3-DCF out of Štip (sans ICAO code), by far the best of the few remaining U-75s in the country. Naturally, my camera had made all three trips as well, making for some entirely predictable results…
On a serious note: the story of every aircraft featured here touches upon, in one way or another, the Yugoslav independence wars of the early 90s; it’s simply the nature of the beast (much to my regret, having lived through those times). Since this site is, and has only ever been, about nerdy airplane stuff – and the 90s are anything but that – you’ll have to forgive me for occasionally skimping on the details… as well as being vague at times, since records from the period are not always easy to find (be it from not being kept at all, honestly lost, dishonestly destroyed, or simply unavailable for any of a myriad reasons)
The Mule: E7-PDC
Kicking off both the photos and the tangents is the youngest U-75 I have on file, manufactured in 1985 under the military ID 532381. Nowadays operated by AK Prijedor (AK = aeroklub, flying club), PDC is your typical small-town jack-of-all-trades, used for everything from basic flying instruction to precision flying competition to glider towing – all of which also makes it one of the busiest and hardest-working 75s on the Balkans today.
Since legacy Yugoslav aircraft tend to be “generational hand-downs” – frequently serving out their entire lives with the same club, or changing hands once or twice at most – PDC, like many 75s, has a disappointingly straightforward history. Initially flying with AK Paraćin of (the Federal Republic of) Serbia as YU-DJS, it would be transferred to Prijedor in JUN 1988, becoming YU-DLY in the process. One of the few 75s that do not appear to have gone into temporary military service during the collapse of Yugoslavia, it would remain on the Serbian register all the way into 2003, when it would become T9-PDC… and then finally E7-PDC when Bosnia swapped out its registration prefix in AUG 2007.
The twins. While the most complicated part of the entire airplane – the powerplant – may be as generic as it gets (a 180 HP Lycoming IO-360 whirling a two-blade Hartzell HC-series constant speed prop), the rest of the airplane is pretty much bespoke. This inevitably became an issue once the spares pool had started to dry out – and was further exacerbated by the type’s withdrawal from the Serbian Air Force in 2016-2017, ending any meaningful official support. Remaining operators are increasingly left with few choices but to cannibalize non-flying examples, a fate that likely awaits E7-PDB as well…
Despite its seemingly compact appearance (accentuated by the short 9.73 m wingspan), the U-75 is a proper chonk of an airplane – which becomes particularly obvious when parked next to something else. The wing root alone is approx. 80 cm off the deck, while the wingtip itself has a very generous 1.1 m ground clearance – both far in excess of many other low-wing two-seaters (E7-PDH would, sadly, be lost with both on board barely six months after this was taken)
As iconic a cockpit view as there can be on the Balkans! True to its role as an everyday workhorse, E7-PDC has a few add-ons not normally found in other U-75s: a Garmin Aera 500 GPS unit, an ICOM IC-A210E com radio, and a Trig TT31 Mode S transponder (the King KR 85 ADF doesn’t count; that was part of the factory standard fit). Other new bits include more modern seats with modern harnesses, and outside there’s a full suite of LED navigation and strobe lights
In addition to the panel layout, another thing to get used to inside are the very lines of the cockpit itself. The heavy frame and low door sills mean that looking forward initially feels like you’re peering out of a post box, while glancing over the sides you’d think you’re in an observation airplane. However, once you get a bit more comfortable with it all, it doesn’t feel even remotely as unnatural as it looks; the short downward sloping nose – plus the extensive glazing and generally airy feel to the cabin – mean that visibility is actually borderline excellent in all direction except backwards
1 among the many specifics of Yugoslavia’s aviation industry was the often confusing interplay of civilian and military interests in the design and manufacture of light aircraft. A perfect example, the U-75 itself was conceived to cater for the needs of both the civilian Vazduhoplovni savez Jugoslavije (VSJ, Aviation Federation of Yugoslavia) and the Yugoslav Air Force (Ratno vazduhoplovstvo, RV). It included very nearly equal amounts of input from both of them – a tow hook for the VSJ, underwing hardpoints for the RV for example – and both were intended to split the bill of its development. However, due to the military’s higher position in the state apparatus (not to mention having eventually ended up covering most of the expenses), all of the aircraft would actually be owned by the RV, with an agreed-upon number made available to the VSJ through a lease agreement. The VSJ would, in turn, distribute these aircraft to flying clubs across the land according to its own internal schedule. This meant that in peacetime, the RV could recall aircraft from civilian service to cover its own operational needs (such as replacement of losses) – and in wartime press them into use as nuisance raiders armed with two of either 120 kg dumb bombs, 12-round 57 mm rocket packs, twin-tube 128 mm rocket launchers, or 7.62 mm machine gun pods.
As an upshot of this “ownership structure”, all of the U-75s used by the VSJ would also carry the RV’s standardized five-digit ID (evidencijski broj, record number) alongside their normal civilian registrations. Here, the first two digits would denote the aircraft type, and the last three a particular aircraft’s position in the production sequence (with the 0xx block reserved for prototypes and pre-production examples, and 101 onward for series machines). With the U-75 having been assigned the type code 53 – and the two production batches being 53101-53124 and 53151-53261 – PDC’s ID of 53238, for example, works out to being the 111th production-standard 75 made. These IDs were sufficiently big a thing in fact that they became the stand-in for serial numbers when identifying individual airframes – so much so that many forgot the aircraft even HAD factory/line numbers to begin with.
To complicate matters even further, the RV also used custom type designations for many aircraft in its service, usually a combination of the aircraft’s role and its two-digit type code. The U-75 so became the V-53 (višenamjenski, multipurpose), though this tended to be rarely used outside of official documents and manuals; thus, U-75 YU-DJS of “the civilians” and V-53 53238 of the military would actually be the very same airplane.
But wait, there’s more! “According to its own internal schedule” is just an abridged, diplomatic way of saying the bureaucracy didn’t end there – not even remotely. Subordinate to the VSJ proper were the aviation federations of the individual Yugoslav republics and autonomous regions – much of the same really, but with a more tactical, hands-on approach. In the case of the U-75, the VSJ, as the “head office”, would split the 86 aircraft it had received (later upped to 114) into lots deemed sufficient for the needs of each republic/region – and then sit back and let the individual federations do the heavy lifting of allocating them to individual clubs. I mention this because anybody not from around here trying to make sense of the whole arrangement will inevitably run into a myriad of acronyms for the various organizations involved – VS, ZS, ZLOS, … – all of which may seem different and confusing… but all essentially denoting the very same thing. The main culprit here is linguistics – and to avoid setting off a firestorm, suffice to say that there were two dominant languages in use back then: Serbo-Croatian (Yugoslavia’s lingua franca) and Slovenian. You can probably see where this is going:
VS: vazduhoplovni savez … “aviation federation” in Serbo-
ZS: zrakoplovni savez … “aviation federation” in -Croatian
ZLOS: zveza letalskih organizacija Slovenije … “the union of aviation organizations of Slovenia”, a long-winded way of saying “aviation federation” in Slovenian
The warbird: S5-DCI
The next one, by contrast, is NOT your everyday hauler; indeed, it is (or rather was) possibly as close as you could get to an operational, original military-spec 75 anywhere in the lands of former Yugoslavia. Manufactured in 1980 as 53171, it would be allocated to AK Maribor right from the beginning, initially under the reg YU-DGF. Come the collapse of Yugoslavia in 1991, it and other Slovenian U-75s would be pressed into service with the 15. brigada vojaškega letalstva (15th Military Aviation Brigade) of the newly-formed Slovenian Air Force. Now known as SL-DCI, it would eventually become the S5-DCI we know today when Slovenia was allocated its permanent registration prefix2 in 1992.
Used solely for training duties during this time3, all of the impressed U-75s would be withdrawn from service in 1994 and replaced by the Zlin Z-242L. The surviving machines (some having been lost to accidents) would eventually be released for use by their original flying clubs, though they would nevertheless remain under military ownership for the next two decades4. And while all of them would lead busy civilian lives throughout the rest of the 90s, age and spares and maintenance costs would eventually whittle the fleet down until only DCI remained, operated by AK Maribor’s successor, Letalski center Maribor (LCM).
Initially earning its keep as a glider tug (and occasional competitor in the odd precision landing championship), by the mid 2010s it would increasingly take on the role of the “treasured family oldtimer”, flown pretty much solely for the experience and its historical significance. By mid 2022 however, the Utva Curse would catch up with it as well, with an upcoming engine overhaul – made doubly more expensive by post-lockdown inflation – being simply too expensive to be justifiable, particularly given the financial commitment required by LCM’s large “daily driver” fleet. With just 45 hours left to run by the time I arrived (again), DCI was flown to exhaustion over the summer, and finally ended its career in autumn with some 4,620 hours on the clock…
The last place you could see 1991-1994 Slovenian Air Force colors out in the wild. Serving out its third consecutive year in the hangar at the time of writing, there is a possibility (albeit not a definite one) that DCI might eventually join the ever-growing collection of airplanes at the fantastic Park vojaške zgodovine (Park of Military History)… note also the prominent fairing under the wing just outboard of the main gear; this covers up the fuel level sensor and fuel tank drain port – and NOT the pylon attachments as some seem to claim (these were located further out roughly half way towards the wingtip)
Hopping around tight grass strips on the edges of forests, a green panel inside and beautiful green landscapes outside… happy place, happy place!
A cockpit study… in banging my head against the overhead frame while trying to find a good angle. Unlike PDC, DCI’s interior is entirely stock, the only additions being the King KT76A transponder and Trig TY96 com radio
It’s hard to appreciate just how thicc the U-75 really is until you stand behind it. The vertical stabilizer tops out at approx. 3.2 m, while the trailing edge of the horizontal is at something like 1.7. Note also the tow hook under the tail, a VSJ requirement as stated previously
2 since they actually represent a national radio communication identity rather than just plain nationality, registration prefixes are regulated by an industry-spanning multinational body called the International Telecommunications Union (ITU). Since the ITU is a big thing with its own processes, meetings, committees and all the accompanying inertia, it takes awhile to get anything major done – particularly creating and allocating an entirely new prefix. To expedite abandonment of the now no-no YU-, both Slovenia and Croatia adopted temporary non-kosher prefixes of their own choosing that would be considered “legal tender” until the ITU decided on a permanent solution. Slovenia thus went with SL-, while Croatia opted for RC- (Republic of Croatia). By the mid-to-late 1992, all the required processes were complete, allowing for today’s S5- and 9A- to come into use…
And if anybody’s wondering what was wrong with SL- and RC-: as far as I can work out (and I reserve the right to be wrong), SL- had previously been used between 1947 and 1959 for the Saar Protectorate – a bit of Germany that France likes to occupy after every world war – and likely the ITU didn’t want to reuse it so soon. To dial up the irony in this to 11, Somaliland – an unrecognized breakaway territory of Somalia – is nowadays using the same SL- prefix for itself (apparently illegally), and on U-75s of unknown origin to boot! On the other hand, R + the earlier letters appear to be reserved by Russia for future expansion of its registry (such as the RF- regs used by its military hardware), while HR- (from Croatia’s native name, Hrvatska) was already taken up by Honduras
3 upon their formation, both the Slovenian and Croatian air forces existed pretty much in name only. With no proper combat aircraft and few left to capture (most RV units having been withdrawn to bases in Serbia and Bosnia on the eve of war), both forces had to take whatever they could get their hands on – hence the impressment of civilian aircraft from flying clubs. By virtue of its distance from the actual shooting, the Slovenian Air Force could afford to use its U-75s in the training role only; in Croatia however, the reality of BEING the front line meant that the Utvas actually had to go to war as designed – for the first and only time – hastily armed with Yugoslav M79 and M80 shoulder-launched anti-tank systems strapped to the wings in lieu of proper air-dropped munitions.
While this was (and remains) a masterclass in ad-hoc field improvisation and lateral thinking, the fact that it was organized so quickly and successfully owes something – ironically – to a Yugoslav “institution” called TO. Short for teritorijalna odbrana (Serbian) / teritorijalna obrana (Slovenian and Croatian) – meaning simply “territorial defense” – these were archetypal socialist paramilitary defense organizations, in essence irregular units that could be quickly raised from the civilian population in time of war. With their “biggest selling point” being the speed and geographical extent in which they could be activated, their primary goal was to harass and slow down the enemy using unconventional tactics, giving the regular army time to fully mobilize. A key component of this approach was using off-the-shelf “whatever is at hand” equipment, which also included civilian light aircraft. While even Western types were included in the scheme (Yugoslavia having had sizable Cessna and Piper fleets since the 60s), the most common actor in later years was the U-75 itself, since it was literally designed with this in mind. Using aircraft leased from flying clubs (albeit without pylons fitted), the TOs would run a number of exercises through the 70s and 80s, which went a long way to smoothing out kinks in the concept and providing experience to both air and ground crews. Indeed, the TO program as a whole would be wound down at the end of the 80s for fear that it would provide a nucleus for the formation of proper armies and air forces in any breakaway republics… which, in fact, was exactly what had ended up happening in Slovenia and Croatia
4 in this system, the clubs themselves would pretty much be responsible only for the airplane’s day-to-day operational costs and regular maintenance, while the military would do all major servicing and overhauls of its own accord (and out of its own pocket); more than anything else, this helps to explain why the U-75 held on in Slovenia for so long. However, in the early 2020s, the whole fleet would be placed under the jurisdiction of the civilian Letalska zveza Slovenije (LZS, Aeronautical Association of Slovenia), which would in turn transfer full ownership of individual airplanes to the clubs themselves. Included in this deal was a caveat that the airplanes could not be sold onward, which meant that they were now stuck where they were and completely at the mercy of their clubs’ finances. And while for 99% of the 75s this made little difference (having already been grounded and condemned to “hangar arrest” for years), for DCI it spelled a very resounding “game over”…
The joyrider: Z3-DCF
We had the mule… then the warbird… and now finally, here’s the mule-bird 🤔. Today used for a curious mix of frequent glider towing and even more frequent joyriding, Z3-DCF is one of those stereotypical Balkan aircraft that have been with the same operator and flying from the same airfield their entire lives – albeit with one notable break. 1981 and 53183 being the important bits, it was delivered new to AK Štip as YU-DGX, and would remain with the club all the way until 1993, when it would be pressed into military service5. Becoming Z3-DGX the same year, it would eventually take on its current identity in JUN 1994, when all remaining Macedonian U-75s appear to have been standardized into the Z3-DC* registration block. Finally, it would make its way back to AK Štip in 1996 when the Macedonian Air Force, like its Slovenian counterpart, started the switch to the Zlin Z-242L6.
Push, push, push, I can see the prop! Being a touch under 700 kg empty, pushing the U-75 up any form of slope is a guaranteed workout – especially on a soft surface (and don’t worry, as the youngest present, I did jump in and throw in my lot immediately after this was taken)
Maro says the walkaround is complete, no findings. If you can’t trust the airfield cat, who CAN you trust?!
Stick, rudder, throttle… and outside the sun-kissed slopes of Mt. Plačkovica. Had worse days out to be honest!
I may be biased – having grown up around hills, forests and rivers – but the views out here are a sight for sore eyes! Another sight that fails to escape notice is the 75’s small(ish) wing, which does make for quite a good view down. Despite its lack of span however, the wing area is still significant at 14.63 m2; at the type’s usual7960 kg Maximum Take Off Mass (MTOM), the resulting wing loading is just 65.3 kg/m2, not that much more than the 64.4 of the average 80s Skyhawk
5 while all the countries that broke away from Yugoslavia outright had sizable fleets of U-75s on the eve of independence (Macedonia 10, Slovenia 15 and Croatia 14), it is the Macedonian fleet in particular that warrants another tangent. By virtue of the country’s peaceful and orderly departure, with none of the fireworks seen up north, its 75s were neither sent to the front, nor pushed to destruction through intensive training and liaison operations; indeed, it took two years from the country’s SEP 1991 independence for them to even be drafted. What’s more, faced with the same lack of spares and support as everybody else, it appears that only two machines would actually be impressed and used: DCF and 53167 YU-DFZ/Z3-DFZ (later renamed Z3-DCE).
Being out of harm’s way also meant that quite a significant number of them had survived to fly another day. Of the 10 in country at the time of independence, eight were operational, and six would eventually live to see the Z3- prefix be introduced. According to available info, three remain flying today, DCE, DCF and 53118 YU-DFB/Z3-DCC/Z3-DAN. While this may not sound like something to write home about, the total sum of operational examples in Slovenia and Croatia is currently… zero
6 try to spot a pattern:
Slovenia declares independence… impresses U-75s from flying clubs… replaces them with Zlin Z-242Ls
Croatia declares independence… impresses U-75s from flying clubs… replaces them with Zlin Z-242Ls
Macedonia declares independence… impresses U-75s from flying clubs… replaces them with Zlin Z-242Ls
Either the Zlin really is that good… or we Balkan people are an unimaginative lot 🤔. Joking aside, there are some notable differences though: while Slovenia and Macedonia had ditched their fleets already in the mid-90s, Croatia held on to them until all the way until 2007. Croatia too would be the only one to NOT return the aircraft to their original owners – bar for one, mentioned later
7 I say “usual” because the U-75 actually had two MTOMs – the applicability of which depended, quite literally, on how many times you wanted to use the airplane afterwards. In the “training configuration” (used by the military in peacetime and by civilian operators all the time), the MTOM was capped at the aforementioned 960 kg, which was sufficient for two RV-standard crew and full tanks (2x 75 l). Critically, this was also identical to the Maximum Landing Mass (MLM), keeping things nice and simple, and assuring that the aircraft would (barring “unforeseen circumstances”) survive intact to its expiration date.
In the “combat configuration” however, the MTOM went up to 1,200 kg, which now allowed for two RV-standard crew, full tanks – and, critically, the maximum permissible war load of two 120 kg bombs (960 + 240). Since the aircraft’s role as nuisance raider meant that its expected lifetime in an actual shooting scenario was rather low, the additional stresses imposed on the structure while maneuvering at such masses were not considered limiting – especially since the aircraft would in all probability be lost well before it began to suffer from the strain.
The 1,200 kg limit would have also been pertinent for a proposed “ferry configuration”, in which the aircraft would be fitted with 2x100 l external tanks, one on each wing hardpoint. With a resulting 350 l of usable fuel, this setup was projected to give a range of almost 2,000 km – but in reality, the aircraft had never been flown even close to that during flight testing, and the whole idea would eventually go nowhere
BONUS: The Silent Ones
With the “three” now accounted for, it’s time to turn our attention to the “a bit” part. This “organized Utva hunting” being a relatively recent development (2017-2018, and then 2022 onward), it took me until typing this whole thing up to realize that I’ve been stumbling upon various U-75s since 2010, usually by accident and without prior knowledge of their existence. Having written off those encounters as a “one of” each time – “like that’s ever gonna happen again” – collating all of those photos into a single gallery had never really occurred to me… until I spotted E7-PDB in one of the shots above and went “hmm”. So, since it is the main culprit for this piece twice as long as it needs to be, we’ll start from there…
A gem straight out of the gate: ID 53182, making it Z3-DCF’s immediate older brother. Initially called YU-DGV, it was operated by AK Prijedor since Day 1; however, in the early 90s it would be impressed into the Bosnian Serb army and given the ID 51104 (it is unclear why the Bosnian Serb military used the Yugoslav type designation for the Cessna 185-lookalike Utva U-66). Following the end of the war, it would eventually become T9-PDB and then E7-PDB. Withdrawn from use sometime in the late 2000s, its future is unclear… though it would surprise no one if it became a parts donor to keep PDC running
E7-PDA, kept company by U-66V E7-PDI/51138 and shot across the dorsal fin of U-66 E7-PDJ/51143… what in another time could have been an Utva promo shot has, sadly, become just another reminder of the demise of the region’s aviation sector as a whole. Manufactured in 1983 with the serial 53219, its history mirrors that of PDB: from being YU-DIZ with AK Prijedor, through 51105 in the military, to T9-PDA & E7-PDA…
’tis but a scratch! Born in 1981 with the serial 53187, this sad mess was initially known as YU-DHB, first of AK Banja Luka, and then later AK Bihać. One of the few machines to end up in the hands of the newly-established Bosnian Army, it would become known for its 15 JUN 1992 dash from Cazin to Zagreb (100 knots, at night, through unfriendly skies), intended to open up an air bridge between the Bihać area and the Croatian capital. Having stayed at Zagreb (a return flight at that moment likely being deemed too risky), it would be used to train the upcoming generation of Bosnian military pilots, gaining a camo paint scheme and the reg T9-CLM sometime in 1993. It has been reported by some sources that it had actually made a few runs back to Bihać once the military situation had stabilized; be that as it may, the end of hostilities in 1995 would find it back at Zagreb undergoing heavy maintenance. Through a chain of events that’s not entirely clear, it would end up staying here forever, being slowly stripped of parts to keep the Croatian Air Force’s own fleet flying…
Forming with T9-CLM the second of two “sequential ID” pairs in my collection, 53188 was delivered new to AK Celje as YU-DHC, and would stay with them all the way until its impressment in 1991. Its history immediately after joining the military has some gaps to it, and I could not confirm whether it had ever carried the temporary SL- prefix; what I can confirm is that it became S5-DCJ while there, before rejoining its old alma mater after the introduction of the Zlins. It would serve there primarily as a glider tug, before being replaced by more manageable Western types – including Piper Pawnee HA-TNC, previously a Lučko native called 9A-BLF… and before that YU-BLF, one of a number of PA-25s operated by Privredna avijacija Zagreb
Caught between a trike and a hard place, the 1979 vintage 53122 is the second oldest U-75 I have on file. Originally known as YU-DKT, it would be allocated to AK Novo Mesto, based at the Slovenian airfield of the same name (nowadays LJNM) – ironically today home to world’s sole remaining four-seat U-75A. As was the case with DCJ, I could find no definitive proof that it had carried the SL- prefix in military service, only that it would return to civilian life under the reg S5-DCD. At some unknown point in time (but apparently quite a while ago), it would be withdrawn from use and chucked in the back of the hangar at nearby Metlika Airfield
The first U-75 I have on digital… but not the first one I’ve ever photographed, the honor going to DCI on film in 2002. 53233 from 1983, new to AK Murska Sobota as YU-DJH, all the 1991-1994 stuff as before, renamed into S5-DCN. Don’t really know what had happened to it since, saw it last in 2010 when it was still airworthy…
What could easily pass as an 80s flight line is, in fact, just part of the decommissioned U-75 fleet of the Croatian Air Force (10 strong at its peak). Leading the pack is 009 (1981 • 53177 • YU-DGH of AK Split > 001 of the CroAF (not to be confused with the later 001 of the CroAF) > 9A-DCH of the CroAF > 009 (despite still carrying the civilian reg) … then there’s 002 (1980 • 53169 • YU-DGB of AK Rijeka > 169 of the CroAF > 9A-DGB of the CroAF > 002) … further on, we have 010 (1981 • 53191 • YU-DHF of AK Slavonski Brod > 9A-DHF of the CroAF > 010) … and finally 011 (1983 • 53215 • YU-DJD of AK Vrsar > 9A-DJD of the CroAF > 011)
Crap photo, but featuring by far the oldest U-75 I have: 004. Just the seventh ever made (being 53107 of 1979), it would be operated by AK Osijek as YU-DED, before becoming 9A-DED of the Croatian Air Force and assuming its current military identity in 1995. Behind it is 003, 53179 from 1981, originally YU-DGS of AK Kila Like, then briefly 179 of the Croatian Air Force – and then 9A-DGS and finally 003 (UPDATE: as on June 2025, 003 is in the process of being returned to AK Otočac, the successor of AK Krila Like; it is unknown at this time whether it will be just a static example, or will it be returned to airworthy state)
The One That Made It Home – sort of. 53206 of 1982 and initially YU-DIH of AK Čakovec, wartime would find it without a temporary military ID8, and apparently without an RC- reg as well (despite having been QUITE active back then); it would appear in the registers only slightly later as 9A-DIH, before taking up its definitive Croatian Air Force ID, 008. The only U-75 to have been returned to its original owners following the type’s withdrawal from service, it would briefly become know as 9A-DIR (according to some sources), before finally reverting to its new-old identity. Seen here in 2016 during the final stages of a wheels-up restoration, it was supposed to become the first civilian-owned U-75 to fly in Croatia since 1991; unfortunately, a series of events (including the death of the mechanic doing all the work) meant that the project stalled at some 95% complete – and apart from a fast taxi down the runway, it had never actually made it out of the hangar. A couple of years later though, it would be sold to the Delić family of Medulin (LDPM) – well known locally for undertaking such restoration work on a regular basis, and whose members had been very active on the U-75 scene in Yugoslav times – with plans to finally finish it and get it back into the air after nearly 20 years9…
8 because the U-75s had joined the fight during the utter chaos of the first days of the war, it is of no surprise that their new Croatian identities had ended up being all over the shop. Most of the units operating light aircraft had sprung up essentially where and when they could, formed almost entirely through self-initiative and without much in the way of standardization from a central military authority. Thus, each unit had adopted a different way of identifying its aircraft, including:
the last three letters of their original Yugoslav registration, with the YU- completely or partially removed or covered (e.g. DED, U-DHF and -DIH)
the last three digits of their original Yugoslav military ID (such as 169 for YU-DGB, 179 for YU-DGS and 227 for YU-DJL/53227)
and the sequence of joining the unit (001 for YU-DGH or 002 for YU-DLD/53239 for example)
Once the “early days” had passed and the Air Force had managed to bring everything together under one roof, the U-75s would begin to receive civilian registrations – in essence just their old Yugoslav regs, but with RC- and later 9A- prefixes. The reasons for this are not entirely clear, but it has been suggested that this was a means to pass them off as non-military aircraft, thus bypassing the arms embargo imposed on the whole of former Yugoslavia, and allowing for the import of Western-made spare parts (particularly engines and propellers). Only around the end of the war in 1995 would the markings finally be put right with the standardized system used by the air force at large, the U-75s (as the OG air units) being allocated the 0xx block.
Mind you, things were not that straightforward even after the latter was adopted; 9A-DGH (which was 001 in its original unit) would now become 009, whereas 001 would go to a U-75 captured in 1995 during Operation Storm (ex. 53255, a military original with no prior civilian usage or reg)
9 something similar is afoot in Slovenia as well, with AK Slovenske Konjice well on its way to bringing its own 75 back into service. Reported to be as much as 90% done and just waiting on its engine, the aircraft in question is a 1983‘s 53216; interestingly, this is not a Slovenian native, having originally been operated by AK Kumanovo of Macedonia as YU-DJE. Heavily damaged in 1993 during a period of upheaval among the country’s Albanian population, it would be shipped off to Serbia for a complete rebuild in 2001 – and then sold on to AK Slovenske Konjice the same year to become S5-DPM. Having (again) not flown for some years, it is now back in the hands of the people who had rebuilt it the first time round, with a projected (third?) first flight due sometime in the summer of 2025… so watch this space!
BONUS DISCUSSION/RANT: as you have probably noticed (and lost time getting to grips with), the most complex thing about the U-75 is actually the system that created it. With military IDs, civilian regs, aviation federations, four-seat models and so on, it’s very easy to lose track of the basics, and build up an incorrect picture of stuff like the type’s production run, prototypes, versions and other nerdy bits (myself having been guilty of that numerous times). “If 53261 was the last of the production batch, why did I find mention of 53262 and 53265 on the internet?” “If there were only two prototypes, why do some sources also list 53003 and 53004?” and so on. Well, to set the record straight – and not through me being smart, but by asking people from the Utva works itself – here’s a very quick & dirty recap of what was actually going on…
All told, there were 138 U-75s produced, prototypes and production examples included. The first bit of myth-busting concerns the former; and since there’s no one-liner to describe them, we have to make do with a list:
53001: the first prototype (sometimes labeled as V53001)
53002: the second prototype
53003: the first pre-production aircraft – and the first to start the confusion rolling. Representing what the production-standard U-75 would eventually look like and intended to iron out the final bugs, it got caught up in one of the RV’s many whims, specifically a decree that all the aircraft made should be classified EITHER as prototypes or production machines. Since it was, after all, the template for actual production, the Utva works simply rolled with it, and 53003 became 53101, the first of the series examples (incidentally, despite them being called just “U-75” in everyday usage, their proper name is actually U-75A-21)
53004: the second pre-production example. Caught up in the same issue as 53003, it would go down a different route, being converted into the first incarnation of the four-seat U-75, called the U-78. Seeing as this was a major “prototype-ish” mod, it had managed to retain this ID until being lost in a crash in 1981
Production examples, as mentioned, came in two batches, 53101+53102 till 53124 and 53151 till 53261; the reason for the gap in IDs has never been conclusively established (since the airplanes were produced pretty much in one go), but it is believed to be another one of the RV’s idiosyncrasies. The outlier here is 53262, the final all-new U-75 ever made. The only machine not intended for the RV/VSJ (hence it mostly being excluded and consequently forgotten from production lists), it was destined for Jordan (to become JY-AKI), but was damaged in a test flight in 1986, and ended up being used as a spares donor for the existing RV fleet.
And finally, two examples that tend to cause way more confusion than actual impact – primarily because they carry bespoke follow-on IDs but are actually based on existing airframes:
53263: originally registered YU-XAC (and later YU-BRJ), this was the second incarnation of the U-75 four-seater. Properly called the U-75A-41 (or simply just the U-75A), this was a less extensive rework than the U-78, and was actually made from the surviving bits of 53004, combined with new-built parts and spares; so despite having an entirely new ID number, it was physically (well mostly) an existing example
53265: registered YU-XAF, this was a single-seat crop dusting model called the U-75A-11 (or U-75AG to common folk), and was similarly made out of the shell of 53185 following an accident… again, new number, (mostly) existing airframe
53264 (before anyone asks) did not exists; stories say it was supposed to be a twin-engine model… but that may as well be apocryphal, since there is no existing paper trail to ever mention it. Similarly, the aforementioned Somaliland examples – as well as Sudan’s SAFAT 03, 6-12 re-badged U-75s claimed to have been designed and built in-country – are in actuality all standard VSJ U-75s, though their actual IDs are pretty much impossible to ascertain.
So, the final tally is as follows:
2x prototypes
1x U-78 (later to be rebuilt into 53263)
135x production examples (including 53003/53101, 53185/53265 and 53262)
Summary of aircraft featured (state as of MAR 2025):
53107 •• 1979 • 004 • non operational
53122 •• 1979 • S5-DCD • non operational
53169 •• 1980 • 002 • non operational
53171 •• 1980 • S5-DCI • non operational
53177 •• 1981 • 009 • non operational
53179 •• 1981 • 003 • non operational
53182 •• 1981 • Z3-DCF • operational
53183 •• 1981 • E7-PDB • non operational
53187 •• 1981 • T9-CLM • non operational
53188 •• 1981 • S5-DCJ • non operational
53191 •• 1981 • 010 • non operational
53206 •• 1982 • 9A-DIH • in rebuild
53215 •• 1983 • 011 • non operational
53219 •• 1983 • E7-PDA • non operational
53223 •• 1983 • S5-DCN • non operational
53238 •• 1985 • E7-PDC • operational
Sources:
Istorija vazduhoplovstva Pančeva: Utva 75 (printed book by Dragan Kolundžić & Dragoslav Dimić)
Utva 75 – album VSJ (printed book by Dragan Kolundžić)
Utva: fabrika aviona 1937-2022 (printed book by Dragan Kolundžić)
It’s a story as old as time: boy wants to fly airplanes; boy gets PPL. Boy wants more power, more speed, more avionics, more range; boy gets airline job. Boy gets more than what he asked for; 5000+ hours later, boy grows wiser (crankier) and starts finding immense pleasure in flying the least amount of airplane bits necessary to actually be an airplane. Boy gets into TMGs. Boy drifts further into the extreme and gets into ultralights. Boy’s sailplane mates buy ultralight; boy remembers he has Achtung, Skyhawk!. And what follows is pretty obvious…
Through sheer long-term exposure to the “more fancy” bit of aviation, of late I have grown to greatly appreciate the elegant, unpretentious simplicity and undiluted “in yo face” flying experience that can be found on the other end of the spectrum. While I have not (yet?) gone down the route of the non-rigid wing, the world of the sub-100 HP single- and two-seaters has firmly ensnared me – as an emerging trend of topics on here may already suggest 🤔. Happily, this change of tune had coincided with an interesting uptick in the number of new motor gliders and ultralights in Croatia, with one seemingly joining some fleet somewhere every couple of months. There was the JUL 2024 arrival of a mint Scheibe SF-25C Falke 2000 (the last, great 1990 everything-fitted-as-standard Limbach model before the type’s switch to Rotax power)… then in DEC 2024 we got a crisp Fly Synthesis Texan on long-term load (only the second ever of its type in country, and the first on the 9A prefix)… and now in MAR 2025 a Fly Synthesis Storch prepping for its highly anticipated (by me) first flight after a major rebuild (and while the Storch may be a common animal here, this is the only “big wing” CL model for miles and miles around).
Lots to choose from then. But we start in OCT 2024 at Čakovec (LDVC) in the north of the country, with three sailplane/TMG drivers who took the plunge as well and brought over Croatia’s first ever TL-Ultralight TL-232 Condor Plus… 🥳
Introductory photo shoot on the ground? Nah, too boring…
TL; DR
But first, the Achtung, Skyhawk! obligatory backstory (it’s the law!). Unlike many of the aircraft featured here, the TL-232’s is pretty straightforward (😭), and starts with the original TL-132 Condor first flown in 1993. While TL-Ultralight is nowadays one of the Czech Republic’s most successful aircraft manufacturers – with hits such as the TL-96 Star, TL-2000 Sting and TL-3000 Sirius – and one of Europe’s pioneers in the mass production of modern, affordable composite airframes, back at the beginning of the 90s it was a struggling maker of ultralight trikes (such as the TL-22 Duo, designed in-house), trying to keep its head above the turbulence of the 1989 Velvet Revolution and the dissolution of Czechoslovakia in 1992.
The company’s roll-of-the-dice foray into the “mainstream ultralight market”, the 132 is an entirely conventional high-wing side-by-side two-seater that gives off a very “50s Piper, but more angular” vibe. Based on tried-and-tested can’t-mess-this-up steel tube/fabric cover construction, it was originally intended to run on two-stroke power in the form of the then-popular 53 HP Rotax 503. This was OK-ish given that its MTOM was limited to 450 kg | 990 lbs by ultralight class regulations, but performance was generally far from spectacular and bordering on the underwhelming. Hard numbers are difficult to nail down properly due to the myriad variations between individual airplanes, since the majority were supplied as kits to be built and modded by the owners themselves – but maximum speeds of 130 km/h |70 kts and climb rates of 2-2.5 m/s |400-500 fpm are reported as averages; not great, not terrible and hardly something to write home about.
Pretty soon, the more potent 64 HPRotax 582 became a popular drop-in substitute due to its identical dimensions and mounting points – while users wanting to move away from two-stroke engines in general would swap them out for either the 80 HP Rotax 912UL, or (for budget-conscious users) the automotive Subaru EA series with a conversion kit (most commonly the 78 HP EA81 made popular by the ACM Drahoš works of Tutnov in the Czech Republic). As before, the performance figures were all over the place, even for airplanes with the same nominal power output1; but in general achievable cruise speeds tended to jump to around 150 km/h |81 kts (right up against the maximum placarded structural speed) and rates of climb to as much as 5 m/s | 1,000 fpm for the “big engine” examples.
1 while this is true for ANY aircraft, using just the nominal power output for a performance comparison is a complete minefield in the world of non-certified aircraft. The reasons could fill an entire book, but the most pertinent is that what’s “written on the tin” is just the maximum power output, time-limited and used for take-off only – and not what the engine can give continuously. Engine A may churn out 80 HP for up to five minutes, but allow for only 70 in the climb and cruise… while Engine B may do “just” 78 HP for take-off, but output as much as 75 for hours on end. A 5 HP difference doesn’t sound like much, but on airplanes with an MTOM of less than half a ton, you’re going to notice them. Then there’s also the prop: two-blade, three-blade, wooden, composite, hand-made, CNC-machined, classic, modern, low pitch, high pitch… your performance mileage will definitely vary…
One of the cleanest Condors I’ve seen online, taken by Mr. Milan Cibulka over at JetPhotos. The key recognition feature versus the TL-232 is the “fullback” rear fuselage – which, from a distance, makes it hard to tell apart from the very similar Rans S-6 Coyote II. Indeed, with the latter having been introduced several years earlier in 1988, there are persistent rumors/accusations online that the 132 is either “modeled” or directly “based” on the S-62
The factory-spec Condor’s lack of oomph, and the rate (and creativity) at which users were swapping in a smorgasbord of more powerful engines, soon convinced TL to address the issue right at the source. Already in 1994, work started on the improved TL-232 Condor Plus (sometimes also labelled as the Condor+), which now came with the Rotax 582 or 912UL as standard (also the default offering on all of its competitors, including the S-6, Kitfox, Avid Flyer and so on). Other changes included:
a cut-down fully glazed “greenhouse” rear fuselage (with which the type is nowadays most closely associated)
a modified wing profile for reduced drag
and composite rear fuselage upper decking stretching from the “greenhouse” to the stabilizers
However, what effect these very simple tweaks had on sales is hard to judge with any measure of objectivity and empiricism. Actual production figures are nigh-on impossible to come by, with the only thing coming close being a quote on the manufacturer’s website claiming that the combined production of the Condor line “exceeded 300 units”… and elsewhere online that the 232’s production had lasted into the early 2000s. The best I can give you (and not for lack of research) is that today you’ll be hard-pressed to find an airworthy 132 outside of Czechia… while 232s abound by the dozens, particularly in Germany…
2 whether or not any of that’s actually true (or, more likely, to what extent) is up for debate; however, the precedent had already been set by TL with their first ultralight design, the TL-32 Typhoon of 1991. Despite the designation, this machine bore no relation to the Condors, and was, in fact, “heavily inspired by” the German Comco Ikarus C-22, first flown in 1987. Sharing the same layout, dimensions, masses, powerplant options and performance bracket – but with just enough different solutions for it to not be a 1:1 copy – the TL-23 would go on to sell in “over 200 units”, comparable even to the TL-232; but despite this, finding one in the wild today is nigh on impossible outside former Czechoslovakia, which is why I had to dip once again into the “online bin” to find a good photo…
… versus my mate’s slightly tired 1992 C-22B. While you can spot a number of differences even at a glance – rubber vs actual springs on the main gear, different elevator & rudder linkage, different nose and aft fairing profiles and so on – overall it’s tomato-tomato
Not to diss the TL-32 however, one can argue that its success led to, and was a direct catalyst for, the creation of the TL-132 and 232. Having logged time on both the C-22 and another one of its clones – the Italian Euro-Ala Jet Fox – I can confidently claim that these airplanes are a complete and utter riot… provided you’re a masochist and don’t intend on actually going anywhere. Their fun factor is truly off the scale – but, in their stock forms, creature comforts can be found in trace amounts only; practicality is straight out of a Wile E Coyote cartoon; and performance and endurance are LOL unless you have an 80 HP four stroke engine (which is definitely NOT the norm). With cruising speeds of around 100 km/h | 54 kts and up to 15 l/h | 4 GPH fuel flows on tanks rarely larger than 50 l | 13 USG, they’re the bee’s knees for local joyriding and having fun; but if your needs are more “conventional” (i.e. air work, training, cross country, towing), you needed to look elsewhere…
Precisely this appears to have been the motivation for “moving on” (as TL’s owner, Jiří Tlustý, stated on the manufacturer’s website) with the immeasurably more usable, user-friendly and capable Condor, which was able to be financed directly by sales of the Typhoon. If anything, in what would be a very pleasing bit of circularity, the in-turn success of the TL-132 and 232 (among others) might have been the trigger for Comco Ikarus to develop its own contender in 1996, the ultra-popular C-42 family (going on for 1,200+ sold now)…
One man’s trash…
Germany too was where the 232 that started this post came from, more precisely the aerodrome of Braunschweig (BWE/EDVE) in the federal state of Lower Saxony. Registered D-MULL (an interesting pun given that müll means “trash” in German 🤔) and only ever owned by one man (!), it was completed in 2001 with the serial 01C01 – which actually makes it both the first Condor kit to have been produced that year… and likely one of the last 232s ever made.
Everything you’d expect to find where you’d expect to find it; what some would call “classically correct”. Unlike the S-6 it was supposedly modeled on, the 232 was never offered with a tailwheel option; the likely reason is cost and simplicity, since taildragging and nosedragging Coyotes are quite different underneath (different structures with different load paths) and cannot be converted between the two configurations without some significant metalworking
Even though the 80 HP Rotax 912UL was intended to be the “flagship” engine at the time of the 232’s debut, like many late-production examples, D-MULL was fitted outright with the more meatier 100 HP Rotax 912S. Combined with a tailhook for towing gliders or banners (a Tost E85 unit in this particular case), this setup should more accurately be called the Power Condor – though I’ve never seen this designation used “in the wild”, and all of the type’s official documents still refer to it as a Condor Plus.
Not the best light (we were waiting for the morning fog to clear), but still useful enough to show off some of the airplane’s bits and bobs! Starting from the top, how to spot the 232’s composite deck: just look for the lines of rivets that fasten it to the underlying structure •• then there’s the distinctive ventral fin for the towing hook, an easy way to confirm the airplane is a 100 HP model; the hook release cable is internal, and runs alongside the rudder cables to a lever in the cockpit •• in another likely attempt to simplify production, the fuel tanks can be fitted to the wing roots only, with D-MULL sporting the standard 2x 27 liter | 7 USG fit; on the S-6 (and a number of other period Rans designs, such as the S-12 pusher) you could spec either a single fuselage tank behind the seats (usually 50 l | 13 USG), or twin 35 l | 9 USG tanks in the wings. If you were adventurous enough, you could fit all three for bladder-bursting endurance •• and always a problem area for high power ultralights, propeller ground clearance. While you could squeeze more efficiency out of the available power by using a two-blade prop (less blades means less disturbed air and less interference), the blade span that would be necessary would mean it would likely be digging a trench as it spun along; since that is not good at all, it necessitates a trade of efficiency for clearance by going to three (or even four) blades. An additional benefit of 3+ blade props is also a decrease in vibration and noise, since the prop is naturally more balanced, and the shorter blades mean that even at max RPM their tip speeds are still well below the transsonic region
Up front you have everything you’ll ever need for VFR duty: the UL “basic three”, supplemented by TL’s own multi-parameter engine instruments giving you engine RPM, oil pressure, oil temperature, coolant temperature and fuel flow (with a computed “fuel remaining” function that works by subtracting the flow meter output from the fuel on board you entered manually before flight; there is no actual fuel level sensing other than looking at the sight gauges on the tanks themselves). Rounding all that up is a Funke ATR833S 8.33 kHz com radio w/intercom, a Filser TRT800 Mode S transponder, and a Funkwerk TM250 traffic monitor that displays nearby airplanes with operating Mode A/C/S or FLARM systems. And, if you’re lazy like me, you can stick on a cellphone or tablet with a navigation app
The performance is much as you would expect given the low mass, high power, large wing w/ a thick low-speed profile, and a propeller set at fine pitch: it takes off and climbs like a stabbed rat (d’uh, glider tug). Admittedly, it was a winter’s day (although not a particularly cold one) when I first flew D-MULL, but with two of us on board and approximately 30 l | 8 USG of fuel – i.e. maxed out on payload and within an atom’s width of MTOM – we were in the air in no time (I’d estimate less than 100 m) and climbing with a consistent 5.5 m/s |1,100 fpm at maximum continuous power (which on the 912S works out to something like 95 HP). Even coming off 10 years on the brutally overpowered Q400, the way it went up was properly impressive – especially considering that fabric covers tend to flap in the airstream (no matter how taut), which naturally creates a fair bit of drag and disruption of airflow.
Going out solo later – just myself, my camera and 20 l | 5 USG of fuel – it stopped being an airplane and became a Looney Tunes cartoon. The performance was such a laugh that I eventually started taking off derated (this being one of the very few GA airplanes in which I was comfortable doing that), never going above 5000 RPM/75% power on the take-off run and still leaving the deck like I was being launched off an aircraft carrier. For a FSAG test (For Shits And Giggles), I decided to try a 95% power climb… and got to 8 m/s |1,600 fpm before I almost overshot up into controlled airspace.
In the cruise however, it suffers from exactly the same “problem” as every other aircraft of its type: it may have the power for speed, but not the aerodynamics (nor the structural strength). I say “problem” because the Condor was never designed to be a long-legged, continent-crushing touring machine that would zip along at 300+ km/h | 160+ knots and get to 10,000 ft without breaking sweat; it was designed to be an unpretentious, simple, cheap-to-buy and cheap-to-run all-rounder. It can handle hauling and climbing and speed in the same airframe – just none of them brilliantly, and that’s perfectly fine; hence why 64 do 80 HP was and remains perfectly sufficient for 90% of its uses. As an upshot, D-MULL’s green arc ends at just a tad over 140 km/h |75 kts – and because the flight was never about actually getting anywhere, we generally tootled around at no more than 115 km/h | 62 kts in level flight, soaking up the scenery…
Speeeeed! With my work having previously taken me to 660 km/h | 360 kts – and now 850 km/h | 450 kts – on a daily basis, it really is refreshing to be able to max out an airplane at what is essentially the Cessna 172’s best-rate-of-climb speed… and barely more than the national highway speed limit in Croatia
In what is a big “thumbs up” from me, the TL-232 lends itself particularly well to one of my favorite flying activities: river running. The extensive glazing provides quite a good view in all directions (though there are a few notable blind spots, at least with my height and its resulting sitting position)… but at the same time, you rarely end up being directly illuminated by the sun in any normal flight regime (which is quite nice in summer). Another (Condor) plus is that the airplane seems to be quite willing & responsive in all axes; this is not always the case with fabric-covered aircraft, which can have a slight delay in their reactions while the fabric itself responds to changes in air pressure during increases or decreases of lift
The interior is so airy and roomy in fact that, on a whim, I decided to do something I’ve ever only done twice in my life: take a selfie (using the towing mirror) 🤔 . Putting aside the fact that during my off days I look and dress like a bum, this shot does highlight one interesting thing: that even at 1.91 m | 6 ft 3″ and with headphones on, I have more than enough headroom in all directions… and coming from me (whose choice of ultralights is severely limited by this very metric), there is no greater compliment!
Back in its very own hangar at Čakovec having done its bit for the day. Parked in their trailers alongside are some the gliders it will soon be towing, including one of its owners’ Schleicher ASW-15 D-0633, another’s Schleicher Ka-8b D-8248… and what used to be my very own Glasflügel H-205 Club Libelle D-2447 (which I decided to sell since the airline job was not conductive to the time requirements of soaring). As the abundance of D- regs in this one comment may suggest, D-MULL will remain D-MULL despite its new place of residence
As always, a round of thanks are in order: Marin Lukas, Jan Gorski and Vladimir “Dado” Majder – D-MULL’s new owners – for going out of their way to accommodate me, and indulging me in my boyish enthusiasm and rampant Achtung, Skyhawk!-ness!
UPDATE: unfortunately, D-MULL would be written off on 26 MAY when it caught fire during ground operation, burning down to just the airframe tubing. Thankfully, the sole occupant had managed to get out uninjured
Ever since I’d gotten my motor glider endorsement back in 2021, I’ve been using the cheapness of the experience to go and explore all the out-of-the-way bits of Central Croatia I’d never have gone to otherwise. While there’s not really much to see here in the way of infrastructure – no majestic castles, no picturesque medieval towns, no sprawling cities, just a handful of abandoned airfields – the nature itself is often overwhelmingly pleasant, with gentle rolling hills, lush forests and meandering rivers complete with all sorts of interesting associated formations. As the 2020 lockdown had taught me the value of appreciating such marvels in full (since I couldn’t really go anywhere else), I continued to visit them all the way into 2025, more often than not at the controls of one of the several Scheibe SF-25 Falke (falcon) TMGs I normally fly.
Since I do 90% of my GA flying in “severe CAVOK” conditions (have enough of the nasty stuff at work) and always have my camera on me, I’ve inevitably ended up with a rather solid collection of aerial landscape photos, the majority of which were taken in the mellow colors of the afternoon golden hour. At one point I had mulled actually publishing this lot as a small e-book… but then in a happy brainwave remembered that I’ve had an outlet for these things since 2009, and that I might as well make use it for the first time in a year 😑. So, after a bit of 👍 and 👎 through the collection, I am pleased to present the (highly optimistic) Flight of the Falcon!
Forests, lakes, low & slow… this feature in a nutshell!
Croatia may already have a heart shaped island – the rather well-known Galešnjak – but there’s no reason for it not to have another one. Reeds, birds, driftwood and motor gliders on the fishponds of the Česma river
While nowadays we see the Sava river as a generally steady, unchanging and comforting presence, throughout history it has occasionally shown itself to have a mind of its own. Through heavy storms, frequent flooding from snowmelt in the Alps and porous land all round, it had shifted its course slightly on numerous occasions, leaving behind dozens of fascinating oxbow lakes – such as this one, just of the village of Tišina Erdedska
Another one – but this time inhabited. The picturesque village of Veleševec was once situated squarely on the main body of the Sava; however, in the 18th century a large storm and associated heavy flooding had, pretty much overnight, shifted the course of the river a couple of hundred meters (!) to the east. While the result is epic to behold from above, the mosquito situation down there must be… something else
While Croatia’s inland fishing industry may not have quite the same renown as its coastal counterpart, it nevertheless does exist – and in more than just token form. In addition to 3,500 km of rivers and god knows how many streams, there are numerous natural and artificial fisheries and fishponds scattered all over; indeed, between my base airfield of Zvekovac (LDZE) and the first-airfield-next-door Bjelovar (LDZJ), there are nearly 20 km of interconnected pools and lakes used for this purpose… which also happen to be one of my favorite spots to chill in the air. This shot perfectly illustrates why!
Traffic, traffic! The problem with flying along fishponds and lakes is that many birds tend to have the same idea… and while my Falcon is as predatory as the biological one, encountering a whole squadron at low level is a surefire way to ruin your day
Alone. While Zagreb’s other two medieval hill forts – Susedgrad in the southwest (known for its long and illustrious history) and Medvedgrad in the middle (one of the city’s main landmarks) – are famous in song and story, Zelingrad in the far northeast has been forgotten for so long that I’d bet 80% of the city’s inhabitants don’t even know it exists. Built in the 13th century in response to some Tatar invasion or the other, it would end up being passed like a hot potato from one noble family to the other for the next 300 years, before finally being abandoned and left to rot sometime in the early 1600s. Today just 40-ish minutes by car or bike from the city center – but back then a better part of the day by mule – and tucked away in a confined valley that’s not THAT easy to access even at the best of times, it would receive some TLC only in the 21st century, with basic conservation and archaeological efforts starting back in 2001…
While to Zagreb-folk like myself – who grew up in its shade – the Medvednica mountain has always been king of the hill (quite literally), barely an hour’s drive east is the equally beautiful Moslavačka gora range of high hills. While it does not share the same Protected Nature Park status as the former, epic nature abounds in equal measure, with an even greater number of medieval forts, even less spoiled forests…
… and a big-ass transmitter on its top. Given that every large hill has an antenna and every small one a church, navigating VFR around here is a doddle!
It’s not all “pretty autumn colors” though; here we have the same Česma fish ponds as before… but in their far less attractive “pea soup/nuclear waste” phase
And finally, a bit of a cheat on which to end this post… this is not, in fact, Croatia, but the Donačka gora range in neighboring Slovenia. Since it is literally two kilometers over the border, we can stuff it in here no problem – especially since the trees are the same, and this is a rare opportunity to look at them like this in level flight. Ah, the magic of being a motor glider gliding along without its motor and being able to do this legally for hours on end! #ridgeliftforthewin
A very Achtung, Skyhawk! PS: the Falkes used in the production of these photos include:
9A-DHD: a 1976 SF-25C with the 60 HP Limbach L1700
D-KDCK: a 1978 SF-25C with the 80 HP Sauer S2100
D-KIAH: a 1989 SF-25C 2000 (large cabin w/ tall canopy) with the 80 HP Limbach L2000
For what is (very nearly) the first anniversary of my article on Croatian cropdusting airstrips, I decided to do something rather special: actually sit down and write something for the first time in 11 and a half months 🤨. Self-critique aside however, I do honestly have something relevant to post. Following in the footsteps of my landing at Blagorodovac in the Falke, an opportunity came about in June 2023 to do the same at Čazma… and since the last time I had landed there was back in 2006 (when it was still more-or-less open), what sort of self-respecting nerd would I be if I passed that up?!
A UFO at a secluded airstrip: it’s a budget Area 51! (with suitable weather to boot)
While in essence a very similar affair to the Blagorodovac op, Čazma does however have a couple of peculiarities to keep in mind. Unlike the former:
it is not in use (unless tractors, lorries and teens looking for privacy count as traffic)
it is not maintained in any way, shape or form
and, most importantly, legally it is no longer an airfield, rather just a random strip of general-purpose tarmac owned by the municipal government
Thus, while securing permission to land at Blagorodovac took nothing more than a phone call to its owner, landing at Čazma would involve seeking an off-field landing permit from the Croatian Civil Aviation Authority. Thankfully, what was once quite an intellectually painful process has now become a more sensible bit of quick bureaucracy, which a colleague from work – who would also be supplying the airplane for the job1 – took care of post-haste.
1 since it had not featured at Achtung, Skyhawk! before, here’s the obligatory introduction: it’s a wonderful little FlySynthesis Storch HS 582 ultralight, manufactured in 1995 with the serial 190. The 582 refers to its Rotax 582 two-stroke engine developing 64 HP, while the HS (short for a very optimistic “High Speed”) indicates it sports a 1.45 m shorter wing than the normal CL model. Used mostly for training, 9A-UFO now sports a pretty chunky three-blade prop, which does limit its top speed to around 120-130 km/h… but on the other end of the spectrum gives a respectable 600-800 FPM rate of climb fully loaded
Enjoying the sunset after a particularly enjoyable riverine flight. Still sporting its old two-blade prop, there’s really a lot to love about it: the handling, the visibility, the metal-composite construction… the big Junkers flaperons… the manly man’s lever to actuate them…
Paperwork aside, the list of considerations for landing at Čazma was roughly similar to that for Blagorodovac:
performance? Yep, we had that; despite the 60-ish HP and the small wing, the figures said 200 m would be more than enough for both take-off and landing (even accounting for a healthy margin of error), leaving us with plenty of room to spare on Čazma’s 650 m runway
obstacles? Nothing close-in for RWY 19; for RWY 01 there’s a power line approx. 200 m from the threshold, but low enough that it doesn’t require any particular aerobatics to get over (it didn’t even with the much heavier and faster C172 back in 2006). Further out, fields as far as the eye can see for RWY 01; but for 19 there’s a hill 800 m past the runway end that would warrant some consideration in case of a go-around or take-off from that direction. The only thorn in the eye were disused power line poles running parallel to the runway with a 30 m offset (which tend to look much closer when you’re actually on approach!)
runway state? My colleague had already been there a few days earlier, plus I frequently visit by car and inspect it from the air on pretty much every flight with the Falke. A bit bumpy, but structurally intact along its full length and perfectly usable even by aircraft heavier than the 450 kg Storch
runway characteristics? Length, no problem as stated. Width? The Storch’s 1.65 m main gear span on Čazma’s 10 m wide runway is considerably more comfortable than the Falke’s 6.5 m outrigger span on Blagorodovac’s 8 meters! Slope? There’s a three meter elevation difference between the thresholds, which works out to a 0.3° upslope along RWY 19; noticeable, but nothing to write home about
All that was left then was the weather. As was the case with Blagorodovac, it had failed to cooperate fully: whereas I did the latter on the hottest day of 2022 (a sweltering 38° C and not a cloud nor shade in sight), The Čazma Run would be marked by thunderstorms in the distance and a mild, but constantly shifting frontal wind that made for quite a bit of turbulence.
Despite years of neglect, the runway markings are actually still faintly visible. The many cracks in the pavement notwithstanding, Čazma (along with Donja Rača) still ranks as the best-preserved of all the 35 remaining hard runways, and would need only moderate investment to become usable again
Though the wind direction was all over the place (occasional gusts from surrounding CBs didn’t help either), markers on the ground – smoke, dust, trees – suggested RWY 01 was the better bet, despite taking us over the aforementioned hill on approach. As before, the landing was preceded by a low pass, both for a final runway inspection and to let any vehicles/pedestrians/animals near the strip know that some airplaning was about to go down. Again as before, I had my action cam with me – but on the inbound flight it had suffered a circuit fart and did not record a single thing 😔. However, I had managed to mend it once on the ground, so to make up for that fail, I decided to shoot a touch-and-go on departure to (hopefully) show just how cool this hidden gem of an airfield really is 😊…
The vid’s sped up and sans audio, since it would otherwise be just eight solid minutes of two-stroke noise overwhelming the cam’s microphone
Of all the things I’d learned during the 2020 lockdown, perhaps the most interesting was that to get my weekly aviation fix, I don’t necessarily need… airplanes 🤔. With our Q400s mostly chained to the ground and the C172 enjoying the fine weather down on the coast, it dawned on me that I could use my newfound free time to hop in the car and go visit some of the many abandoned crop dusting airstrips scattered throughout eastern Croatia – quiet and forgotten reminders of a time when this small region all but fed the whole 22 million strong population of former Yugoslavia.
Apart from the obvious Achtung, Skyhawk! nerd factor, the idea was not without a host of other merits: a change of scenery would do me good… as would the fresh countryside air… and knowing the runways’ current states could come in very handy in case of a forced landing en route, being far more preferable than going down into the corn. Win-win really!
Sneaking a peek at the Topolje strip, one of several located within a stone’s throw from Zagreb
But, as ever so often happens around here, what was supposed to be just a simple road trip to kill the time had inevitably taken on a life of its own – as the cover photo, which features an airplane and not a car, clearly suggests. Bit by bit, the whole thing had evolved into an actual documentary project, which had by the end of 2022 grown to include a sizable collection of photos and videos from a dozen strips – all of which were just begging to be turned into another long-winded article!
Methodology (and madness)
However, this being such a fascinating topic for me, there was a very real chance of going completely overboard with it. The number of strips that survive to this day – as well as their “bland” natures and generally unremarkable individual histories – risk turning any comprehensive list into a dreary quagmire of names, numbers and bullet points, which is not really what this site is about. Thus, to prevent bogging down what could otherwise be an interesting read, I decided straight away to focus solely on the current states of the 12 strips I’d visited (w/ photos obviously), preceded by a short preamble about their raison d’être and a few obligatory Achtung, Skyhawk! factoids.
Because this project was kick-started by sheer boredom, the method that I used to assess the above is, unsurprisingly, fairly unscientific. For the most part, it boiled down to rocking up by car, inspecting the runway on foot and by drone, noting close-in obstacles – and then, situation permitting, driving down the length of it. The reasoning here was that my car weighs roughly what a fully loaded late-model Cessna 172 would weigh, and attempting to hit a realistic landing speed would give me a batter idea of just how (un)usable the runway actually was. Later in 2021, my new motorglider endorsement had opened up a whole new avenue of aerial reconnaissance – and, in the summer of 2022, even the option of making an actual landing. But, for consistency’s sake, the assessments that will be presented here are based on my ground visits only, since they are far more representative and substantial than just casually flying by…
Maize Force
The story of these strips itself starts back in the late 40s with attempts by the Yugoslav government – by then a socialist federal republic – to restart the country’s war-torn agricultural sector. After some brief and unsuccessful flirtation with Soviet-style kolkhoz units – nationalized private land grouped into large collective farms controlled by local municipalities – the state hit upon the idea of instead allotting that land to purpose-made self-contained industrial organizations that would be able to do everything from basic farming to producing and marketing finished goods from the resulting crops. Called poljoprivredno industrijski kombinat (PIK, occasionally IPK) and roughly translated as Combined Agricultural-Industrial Enterprises (or “combines”), their viability hinged on commanding tracts of arable land that were both large enough and contiguous enough to sustain efficient mass production. The only places where there was enough of that to go around, however, were the Croatian regions of Slavonija and Podravina, both taking up the southern end of the very fertile Pannonian Plain. This land was so productive in fact that many combines would eventually reach huge proportions even by the Western standards of the day; the biggest of them all, IPK Osijek (1961-2013), would at its peak control an area of nearly 900 km2 – while the “original gangsta combine”, PIK Belje, grew to encompass 360 km2 in a region that itself barely made it over the 1,000 km2 mark.
These sort of sizes, compounded by an ever-growing number of PIKs and a general increase in demand for foodstuffs, eventually led to a whole new set of operational issues – chief among which was how to best throw a (very) limited amount of machinery at them. Despite the fact that Yugoslavia had started designing its own motorized farming equipment – and producing it on a large scale – already by the mid 60s, the truth of the matter was that relying on surface means alone was simply becoming too impractical, expensive and time-consuming to be viable. Mirroring similar developments elsewhere, the government thus had little choice but call on the power of air power 💪.
The basic idea was simple enough: many large-scale and labor/machine-intensive farming ops could all be done quickly and cheaply by just a handful of specialist airplanes, which could then be easily deployed to wherever the need arose – thus avoiding the need for each PIK to maintain a large, expensive and duplicated equipment pool. All that was necessary for this to take off (heh) was a fleet sufficiently large to make a meaningful operational impact – and a professional authority that could manage it without undue distraction from non-essential tasks. The latter would take the form of twin units called Privredna avijacija (PA, literally Commercial Aviation), the larger being based in the “Slavonian capital” Osijek, and the smaller one in the actual capital Zagreb (plus a tiny semi-independent outfit operating out of Daruvar). Commanding, on average, around 40 airplanes between them at any one time (for a historical total of 74), throughout their lives they would field a pretty eclectic mix of types from both sides of the Iron Curtain, an upshot of non-alligned Yugoslavia’s traditional tactic of playing the East and West against each other for access to its market. PA Osijek would thus end up operating:
the Antonov An-2 as the dominant type
the PZL-Mielec M-18 Dromader
as well as the homegrown Utva U-60AG (a mod of the Cessna 180-lookalike U-60) and the U-65 Privrednik (a purpose-built Pawnee-like design based on the U-60)
PA Zagreb, on the other hand, would become a Vero Beach bastion, with a fleet made up of:
the Piper PA-24 Pawnee and PA-39 Pawnee Brave as the backbone
a small number of the Air Tractor AT-400 series
and a lone Cessna A185F AGcarryall, which I would years later get to fly as 9A-BKS
Nominally under PA Osijek but in practice almost autonomous, PA Daruvar would also march to its own tune, flying exclusively the Cessna A188 as the only operator of the type in the country.
In addition to the “front line” machinery, both Osijek and Zagreb would also operate a number of non-ag types for liaison and training duties, including the Piper PA-18 Super Cub, the PA-23 Apache, Cessna 402 Businessliner – and even a single Let L-200 LIBIS. Interestingly, the service also had a few Agusta-Bell AB.47G helicopters on hand, which would eventually be leased to the Yugoslav Police to form its first air units, kicking off a “Bell connection” that in many places continues to this day…
Cheap strip
With the airplanes sorted out, all that remained were – the runways. And while one may be tempted to ask “just that huh?”, the truth of the matter is that this was actually far simpler to do than it sounds. Since the fleets would normally be based at one or two major airfields near their respective base cities, and then dispatched to wherever needed solely for the duration of the work, the infrastructure necessary to support them out in the field could be as basic as it gets: an open field or a piece of tarmac with sufficient length and bearing strength, and off you go. No hangars, no terminals, no aprons, no facilities, no lighting, no navigation aids… just a turn pad or two, road access, a few trucks for load and fuel and that’s it. Indeed, this was such easy work that a staggering 159 would be built between the mid 60s and 1990, all crammed into an area of just 15,000-odd km2 – only slightly larger than metropolitan Paris, and with its longest axis measuring at just 250 km!
A bit of perspective: the number of fields I’ve visited… and the number of fields that were built (the colors indicate the series of visits: red 1st, yellow 2nd, green 3rd, magenta aerial). Since they were so simple – and took up little physical space – they could be quickly built by the dozens and positioned as close to productive fields as possible in order to cut down on the transit times. Indeed, there are multiple instances of strips being built just kilometers apart – which may sound wasteful, but on the envisaged size and time scale of the operation, actually made a lot of sense in the long term
However, while the PAs were directly owned and managed by the state, the runways themselves would fall under the purview of the individual PIKs, which would build and maintain them according to their own needs and capabilities. Despite this – and the fact that the whole network took the better part of three decades to build – the more permanent strips show a remarkable degree of uniformity to their design, even though there was no single definitive pattern used. While I was misled by initial Google Earth measurements into believing that the surviving paved runways are all 650 x 10 m, a conversation with Mr. Josip Klobučar – who flew for PA Osijek and is the author of the only comprehensive, primary-source book on its history – had revealed that they could be anything from 600 to 700 m in length, and between 8 and 17 m in width.
The lopsided distribution of paved/semi-paved (red, 35 in total) and unpaved (green, 124) strips
In fact, the whole system was – whenever possible – scaled to meet the demands of the aircraft that would use it. In the words of Mr. Klobučar, Osijek’s An-2s (the most numerous single type in either PA) were happy with just the most basic grass strip – hence the abundance of these in PA Osijek’s area of operations. These too were up to 700 m in length, though the ample space of the average field allowed them to be significantly wider, up to 30 m.
Dromaders, on the other hand, were a bit more picky; for while they too could happily operate out of grass strips just like the Antonovs, their higher wheel loading was known to damage the runway surface, particularly at soft-turf strips near rivers or lakes (which pretty much means most of Slavonija). Thus, in areas where they tended to operate more frequently, they were accommodated by a string of paved strips, the biggest of which was Mirkovac (top right in the GE screenshot above), which boasted a fetching 700 x 17 m runway with two aprons that allowed for operations of multiple aircraft at once – a setup that Mr. Klobučar referred to as the “most comfortable strip of them all”.
Further west1, the situation was very much the same. Like the M-18s, PA Zagreb’s Pawnee Braves and Air Tractors were happiest operating out of a hard surface, which accounts for the concentration of red circles to the left. I’ve been told that “regular” Pawnees, being lighter, could handle grass a bit better, but even they got concessions on softer ground – particularly at Topolje (featured in the cover photo), whose first half, used for the initial take-off run and landing, was paved, while the remainder was not.
1 while on paper both PAs had their defined areas of responsibility, in the real world this “east-west” divide was not as rigid as it first seems. In conversation with Mr. Klobučar, I came to understand that there was quite a bit of overlap between the two (and a half) PAs, with numerous instances of Osijek-based aircraft operating out of Zagreb and vice versa. Since this was apparently IRL SOP, it could explain the string of paved strips along the border with Bosnia, well within Osijek’s sphere of influence, but apparently frequented most often by Zagreb’s Pawnee Braves and Daruvar’s 188s…
I spy with my little drone eye…
However, even though new strips were being built as late as 1990 (mostly replacements and/or relocation to new sites), the violent dissolution of Yugoslavia in 1991 would bring the whole operation to a screeching halt. While some PIKs did make it through the war and even survive into the 21st century, at the start of hostilities even their most basic operations would be decimated, let alone “luxuries” such as having access to an air force. This had overnight made the vast majority of airstrips pretty much useless, not least of all because a significant portion of the PA fleet would go on to fight in the war – the most famous of which would be the An-2 “boiler bombers” (armed with improvised bombs made out of gas cylinders and boilers, pushed out of the cabin by the crew) and the “close air support” Dromaders and ATs, fitted with rudimentary aiming sights and a full suite of underwing or fuselage stores.
Following the end of hostilities in 1995 and the reintegration of occupied parts of Slavonija in 1998, no fresh need for the majority of these runways had ever emerged. Grass strips would be the first to disappear, blending seamlessly into the landscape – while only a handful of paved runways would be converted to public use, a couple even receiving ICAO location indicators. Eventually even they would be (mostly) abandoned and (completely) forgotten, visited today solely by tractors, teenagers looking for a bit of privacy – and misguided airliner drivers with nothing better to do in their free time…
In order for the results of these efforts to make sense, I’ve decided on the following labeling convention for each strip:
name (w/ Google Maps link) • PIK served • runway direction (magnetic) • dimensions • state when visited
followed up by a short (or not) commentary and a couple of photos. So let us begin!
1. Badljevina• PIK Ilova • 291° / 111° • 610 x 8 m • unusable (07 JUL 2020)
Starting the list off with the only strip that was not accessible overland (blocked access routes on all sides), so there’s no useful commentary on its exact state; probably for the best really, since an aerial inspection revealed that it is nowadays used for storing manure. Located within spitting distance of Daruvar town, in its heyday it was probably used mostly by PA Daruvar’s A188s and PA Zargeb’s Pawnee Braves…
Happy to let the drone do the leg work on this one… located at the foot of a range of low wooded hills, Badljevina is definitely in the top three most picturesque strips I’d visited, and is absolutely epic when the low afternoon sun hits just right
2. Dubovac • PIK Nova Gradiška • 313° / 133° • 700 x 8 m • limited (21 MAY 2020)
One of those strips that were frequented both by Zagreb and Osijek PAs, Dubovac served one of the more productive PIKs of the time – and, incidentally, one of the biggest producers of fruit juice in Yugoslavia (much of which went to export). Though the surface itself is in good condition, there are a number of obstacles all round, most notably a large haystack off the southern runway edge at the 550 m mark (which is consistently there in satellite imagery) and what appears to be a semi-permanent beehive at the eastern end…
Though the angle gives off a strong “middle of nowhere” kind of vibe, the runway is actually located just 1.2 km from the main Ljubljana-Zagreb-Belgrade highway – itself another Yugoslav mega-project that was once known as “The Highway of Brotherhood and Unity”
3. Gaj • PIK Lipik • 260° / 080° • 650 x 10 m • unusable (15 OCT 2021)
A strip I became aware of – to my chagrin – only after reading Mr. Klobučar’s book, despite it being in close proximity to three other runways, and even occasionally visible from my Q400 on arrival into Zagreb. Nowadays a “multipurpose” runway (used for storage of manure AND as a tractor thoroughfare), this is IMO one of the trickier strips to get into even outside of an emergency, partly due to poor traction and braking action from all the mud – and partly due to a number of ill-placed power lines on both approaches…
Hiding in plain sight. This flying visit on 19 JUL 2022 had revealed that not much has changed since I’d been here by car nine months ago…
With the fields all around being active farm sites, ground traffic on the strip can be comparatively heavy, which makes it another one of those “later than last ditch” choices…
4. Grabovnica (LDZC) • RWY 01/19 • 650 x 10 m • usable (13 JUN 2021)
Hands down my favorite of all the strips I’d visited – and entirely for romantic and biased reasons. Years and years ago, Čazma became the first runway of its kind that I became aware of – as well as the first one I did actually land a Cessna 172 on, back in 2006 when it was still open for business. “Open”, however, should be taken with a grain of salt; for while it did have a tower (or rather, the skeleton of a tower) and a small support apron, there was never really any permanent presence here; like the others, it was just a basic, spartan stretch of tarmac in the middle of a field. There was once a local flying club tased with keeping it open; but various Balkan reasons (political, financial, societal, interpersonal) eventually forced its closure sometime around the year 2010, with the field disappearing from VFR charts overnight.
Just 45 minutes by car from my house – and 10 minutes by motor glider from Zvekovac (LDZE) – Čazma is on my radar quite often, so I do get many a chance to check on its progress. Even though it is located on the site of a WW2 emergency airstrip (made by the Partisans in 1944 for evacuation of wounded), in its current form it appeared only in 1986, and until the collapse of the PAs was used pretty much only for training and liaison flights – so it is by far and away in the best shape of the lot, and could easily sustain normal ops, let alone emergencies. And while there is a low power line some 150 m in front of the RWY 01 threshold, the only significant issue is mud and dirt on the runway, being regularly used by tractors and harvesters shuttling from one field to the next…
A tight, sloping runway… a beautiful backdrop of low hills… and a ton of historical significance… who wouldn’t want to land here? Indeed, back in September 2006, Čazma was host to one of the biggest GA airshows seen in Croatia since 1991, one last hoorah before it closed for good…
Because of its WW2 history and the fame accorded to anything Partisan-related in post-war Yugoslavia, Čazma sports a very in-your-face hammer & sickle – as well as a dilapidated and sad Lockheed T-33B Shooting Star (more accurately, TV2 Seastar) coded 10250, which had previously been located at Zagreb Intl (ZAG/LDZA/LYZA) in front of the old Viša zrakoplovna škola flight school, where I used to play on it as a kid in the late 80s…
5. Lipik • PIK Lipik • 305° / 125° • 600 x 12 m • unusable (07 JUL 2020)
One of the widest paved runways in the network, Lipik’s proximity to its “host city” – Lipik town itself, visible to the left of shot – meant that it pretty quickly found an alternate use: as a driving school polygon. Even taking into account that driving classes are not that frequent in a town with a population of just 6,200, the strip is nevertheless unusable due to hay and manure mounds halfway along its length, as well as creeping grass (VERY slippery) on its eastern end…
Might as well give it a whirl… driving school was a long time ago!
6. Nova Rača • RWY 05/23 • 630 x 9 m • usable (18 MAY 2020)
By contrast, here’s one of the most isolated strips of them all – a solid 15 km in any direction from anything else; not much in absolute terms, but quite a lot given the whole network of 159 airfields spans just 250 km. Second only to Čazma in the quality and usability of its surface, back in 2020 it was even on track to be put back into commission by a local flying club – though things appear to have stalled out, since it was slated to open in the summer of 2021, while an overflight on 17 JUL 2021 revealed no progress whatsoever. Here’s hoping to 2023!
Showing a young colleague some of the area’s interesting sights in the hope of enticing more people to indulge in aero-obscurism!
UPDATE (11 JUN 2025): “hoping to 2023” was a bust, best I can give you is 2025. Having popped round there for the first time in years, there were indeed a number of changes, as seen below…
Fresh photo reconnaissance. The biggest difference are (obviously) the new runway markings; more subtle stuff though includes fresh paving of the RWY 05 displaced threshold, patched up holes all along the runway – and, critically, the removal of the entire offending tree line next to the RWY 05 end
7. Stara Subocka • PIK Nova Gradiška • 027° / 207° • 620 x 12 m • limited (21 MAY 2020)
The westernmost of seven strips belonging to PIK Nova Gradiška, Stara Subocka is also the most difficult to reach by land: three kilometers of unpaved tractor trails that a hardly a fun drive in a 2WD city car. With a pretty generous runway both in terms of width and length, it is also surprisingly devoid of obstacles in the approach paths (which in years past lent it well to practice engine-out approaches) – but is let down by the state of the surface itself. While not as bad as some I’d visited, it is definitely far from ideal and thus viable solely in a more serious and/or time-critical emergency…
Out in the the fields – quite literally
There’s your symptom. While it doesn’t look it on the photo, the surface makes for quite a bumpy ride for most of the runway length, though any self-respecting GA aircraft could handle it – at least once, when it is most necessary
8. Štakorovec • PIK Vrbovec • 335° / 155° • 650 x 8 m • limited (22 OCT 2020)
A strip that hits close to home – mostly because it is close, located on the northeastern edge of the Zagreb metropolitan area. Another late 80s runway, it sits right under the approach path to Zagreb’s RWY 22 (and even slightly within the Zagreb CTR), which again affords numerous opportunities to check on its state. Since it fits rather snugly between two busy plots of land, its usability rather depends on how high the corn is at any given moment; the surface itself is in an OK state, though, like Čazma, it is covered in a fair amount of mud all year round…
Is this what it is meant by “seasonal availability”?
Even without the corn, the shrubbery along the runway edges makes landing a low-wing aircraft here a hugely unappealing prospect… particularly a motorglider
9. Štivica • PIK Nova Gradiška • 006° / 186° • 650 x 12 m • usable (21 MAY 2020)
An incredibly picturesque runway in the middle of nowhere (“twinned” with Vrbje some 5 km to the west), it had been perfectly usable on my last visit, and looks like it could handle even considerably heavier stuff than the 172. The only thing to be mindful of is the shrubbery on the southern end, which IRL is considerably taller than it appears here…
Hard to beat both the view and the convenient road access
10. Topolje • Agroposavina • 112° / 292° • 600 x 12 m • unusable (12 OCT 2021)
The strip featured in the cover photo – and pretty much the biggest oddball in the entire collection 🤔. While the majority of runways in the network were either all-grass or completely paved, 11 were made with an interesting soft-hard surface mix. The proportions varied between individual strips, but usually entailed 300 m of asphalt or concrete (160 to 460 being the extremes), with grass making up the rest until the usual 600-700 m total length. Interestingly, all 11 were quite wide, with a roughly even spread of 12, 13, 14 and 15 m between them.
Located just 30 km from Zagreb, the site chosen for Topolje was within easy reach of the Zagreb PA; however, its close proximity to the Sava River – just 1.5 km as the crow flies – meant that the water table would be a big issue. This in turn posed problems for the Pawnees, whose comparatively high wing loading and long take-off runs were guaranteed to make a mess of things whenever the ground got even a wee bit soggy.
The need to accommodate the most numerous type in PA Zagreb’s inventory – and spend as little money as possible doing it – let to the brainwave of copying the same “composite runway” idea as used in similar terrain further east. While shaving off the expense of laying down several hundred meters of pavement more, this setup would still allow a loaded Pawnee to accelerate with as little rolling resistance as possible, transiting onto grass only after enough lift had been generated to measurably reduce the airplane’s load on the surface. Similarly, the PA-25’s draggy airframe meant the paved bit would be more than sufficient to come to a full stop when landing, adding yet another round of arguments against paving the entire length.
Opened in the mid 80s, Topolje would thus sport a pretty standard 300 m asphalt / 300 m grass combo, with a pavement width of 12 m. However, whether its design checked out in practice is hard to assess – if anything for the very short amount of time the runway was used at all. Today though, you’d be hard pressed to call it even partly usable; for while the pavement itself is in passable condition, there’s a buzz-killing tree right on the runway edge at the 250 meter mark, which, combined with soft ground and lots of shrubbery all round, doesn’t make for a particularly attractive landing ground…
As was the case with Gaj, I was completely oblivious of Topolje’s existence until very recently, despite its proximity to Zagreb; however, unlike Gaj, I did manage to first sight it while overflying the area in the Q400, so I got that going for me, which is nice
The end of the line: rough by 2021 standards, but probably far smoother back in its glory days
11. Vrbje • PIK Nova Gradiška • 093° / 273° • 600 x 12 m • usable (21 MAY 2020)
The aforementioned twin to Štivica, Vrbje is a tiny bit smaller – but is equally usable, despite being significantly bumpier. Still, when passing by with a wonky engine about to die, it’s as welcoming as Frankfurt!
It really is hard to fault the scenery around here… all that is missing is the roar of a big nine-cyl radial…
BONUS: Blagorodovac (LDVD) • PIK Ilova • RWY 02/20 • 600 x 8 m • usable (22 JUL 2022)
And finally, a very special treat – though I suspect more for myself than the reader 🤔: a visit to the Blagorodovac strip near Daruvar. At first, it’s hard to see what all the special fuss is about: the runway is pretty humdrum (albeit a bit tight laterally)… there’s nothing special in terms of facilities… and it has a few standard-issue post-war close-in obstacles on both approaches. However, what it lacks in looks it more than makes up with substance, as:
it is home to the last airworthy survivor of the original PA fleet
it is still in sporadic use today, though closed to the public
and I was going to get the chance to actually land there (again)!
More pretty landscapes, made all the better by huge tracts of peaceful private land all round. The hangar and fuel pump are modern, post-war additions
A village on one end, trees on the other, and a power line to the right… should be an interesting one!
But, to fully set the scene for that last one, we first need to back up a bit. As mentioned in the preamble, the Daruvar area was unique in having its own semi-independent branch of PA, which was Croatia’s sole operator of “The Poor Man’s P-51”: the Cessna 1882. It’s four-strong fleet, delivered in two batches on opposing sides of the mid 70s, included:
Fitting snugly between the regular Pawnee and the Dromader and AT, the 188’s combination of capacity and operating costs lent it particularly well to use in the Daruvar area, where the low density of strips – the second lowest after Zagreb – meant that transits to the working areas were necessarily longer, making bigger and thirstier machines unviably uneconomical.
2 a small pause for a big rant vis-a-vis the complicated designation system used for the 188: prefix, suffix, serial number, even the name itself – it all matters in trying to decipher which version is which. In the beginning, there were just two:
the basic 188 AGwagon 230, sporting a 230 HP Continental O-470-R engine, a 760 l hopper and a 1,720 kg MTOM
and the more capable A188 AGwagon 300, with a 300 HP IO-540-D, the same hopper and a 1,815 kg MTOM
As they entered service, inevitable small issues began to crop up, which Cessna addressed with the improved 188A and A188A. The mess, however, would start with the 188B AGpickup which, apart from more tweaks, differed only in the use of the O-470-S engine, which had different piston rings and modified piston cooling. Meanwhile, the A188B AGwagon would feature just incremental improvements with no changes to the engine itself. The main troublemaker though would be the A188B AGtruck, which came to denote models fitted with an enlarged 1,060 l hopper. If that was not enough, A188s of all versions that were cleared for a MTOM od 1,905 kg can be distinguished by the suffix T at the end of their serial number (like BKP). And finally, there was the T188C AGhusky, essentially an AGtruck fitted with a turbocharged TSIO-520-T developing 310 HP and an MTOM increase to 1,995 kg.
Like many other PA machines, come 1991 the three remaining A188s (BIF having been lost to fire in 1976) would be drafted into the war effort, following which only BKP would return back to civilian life3. With the PAs dead and buried, it would join the ranks of Poljodar Tim, a private agricultural company that also became the owner of the Blagrodovac runway itself. And while it was far from the only “returning soldier” to continue flying beyond the 90s, as the years went on many of them would either be sold or run out of service life, steadily dwindling away until, by the mid 2010s, only BKP remained…
3 while whole volumes could be written about the wartime and post-war adventures of various PA aircraft, I opted to cover the period only hastily and proceed to the here now by the most direct route possible. Untangling any part of the 1991-2001 period goes way beyond the scope of this work – and as a person who has lived through that time, it is my policy to steer well clear of it. Suffice to say that both BIE and BLA had also survived the war
King of The Hill – literally, since the modern apron at Blagorodovac is the highest point of the entire field
Face Off. Even though it was a scorching hot day – and any work apart from breathing was a whole labor in itself – we just had to push the Falke into position for this shot. Worth it!
An old shot from Lučko, but very fitting: The Last of the Mohicans
The mid 2010s would also signal a change of pace for the strip itself. Despite being privately owned and used solely for the purposes of Poljodar Tim, it had for many years been registered as a public airfield (with ICAO code LDVD), which, in practice, allowed for limited public use such as touch-and-goes – the exact method by which I had first visited back in 2010, halfway into a 300 mile navigation flight with the trusty C172. In 2014 however, it would be re-classified as a “registered area for landing and take-off” – in effect taking it off the grid and charts, and limiting its use solely to BKP and Poljodar Tim’s other aircraft, Reims FR172J Rocket 9A-DAF.
Since forgotten and obscure airfields like these hold a particular allure for me, my inner aero-obscurist/child was unsurprisingly through the roof when told in 2022 that it was actually possible to arrange a one-time full stop landing there. Despite having already visited in passing, it still took a minute for my enthusiasm to subside enough for me to start working on the logistics of said landing – particularly since the aircraft I’d use, the aforementioned and aforepictured Falke, was hardly the ideal backwoods STOL bruiser.
Because the runway was still being maintained and in use (albeit sporadically), I could be reasonably sure that I would be able to use the airplane again after landing – so my planning quickly focused on the specifics of the Falke’s landing gear. First, there was the question of shock absorption; while the C model Falke does have a shock absorber on the main wheel, the unit is essentially just a simple rubber spring – which means its capacity to soak up larger bumps is limited, so it was entirely possible for the landing roll to turn into an adventure in low speed hopping on the edge of a stall. Then there was the width issue; an 8 m runway coupled with the 6.5 m span of the Falke’s outriggers left preciously little space to play with on the sides. And while the turf on both edges of the runway was flat and clean – really no worse than the average grass strip – hitting the centerline exactly was definitely the most preferable course of action.
Perspective. Even though the runway is wide enough to accommodate a host of GA types, the Falke’s 15.3 m wingspan gives a pretty convincing illusion of extreme tightness
Then there was the weather. The difficulties in successfully bringing together severe CAVOK, the rest requirements of my day job, DHD’s upcoming heavy maintenance, and the airstrip owner’s will to indulge me, meant that I was left with just a very small window of opportunity in which to do the flight. Since the patron saint of aviation – Murphy – was diligently overseeing proceedings, that window inevitably fell right in the middle of a heatwave and on the hottest day of the year, when temperatures even outside the cities peaked at 38° C. And while 20 years of general aviation had steeled me for the physiological torture of a tight cockpit in summer, what was a worry was DHD’s wheezy 60 HP engine, which would probably be developing closer to 50 in the heat. With two of us and three hours worth of fuel on board, we’d be leaning on the MTOM like drunks on a fence, so climb performance was an area I’d need to consider well in advance.
To reconcile these issues with my desire to avoid appearing in any accident inquiries, I opted for a pretty conservative strategy. It would start out with a slow inspection pass down RWY 20, followed by a base turn into a practice approach for RWY 02, chosen for landing due to its slight upslope and because it would keep the sun behind out backs. Planned from the outset to end in a go around at low altitude, it would allow me to better survey the position of obstacles in the approach path, judge visual cues for landing, and then see just how much (little?) climb performance we actually had (in case an actual go around became necessary). Following a second base turn, I’d make a noisy run back down RWY 20 (as noisy as it can be in Falke), hoping to scare away any wildlife that hadn’t already died laughing at just how pathetic the whole spectacle actually was. Finally, base turn #3 would bring us in for the actual landing.
Another measure I felt could come in handy was coming in with a slightly higher speed, 110 km/h vs the 100 that would be sufficient for our mass. The idea here was to carry some extra energy in case we have to go around at the very last moment, since I would then need some time to switch my hand from the spoiler handle to the throttle, during which I could use up that extra 10 km/h in holding off the touchdown. The trade-off was the potential for a long float, as well as a bounce off the bumpy surface immediately after touchdown (which eventually did happen); the former I judged to be acceptable since I had more than enough runway to come to a full stop even if I landed beyond the 200 m mark, and could also extend the spoilers fully to almost instantly settle down onto the runway. The one choice that didn’t age so well was my intention to land very slightly off the centerline, in order to have an extra margin to the right-hand runway edge in case we bounce and the day’s left crosswind blows us off to the side. In the end I landed a bit too far left for my taste (but still within the confines of the runway), since I had misjudged the strength of the crosswind.
And for how it all actually looked like, here are two handy vids – the first by myself and the second by my passenger, uploaded with his kind permission!
Take-off, on the other hand, was as straightforward as it can be. While the 60 HP Falke does struggle to climb anytime the air density drops even slightly, it glider DNA means it has no trouble whatsoever in leaping off the runway after just a several dozen meters. Even though we were using RWY 20 for departure so we could take advantage of its downslope, we had left the ground in a surprisingly short 250 m, and by the time we hit the 500 mark were already traveling at a satisfying 110 km/h. Of course, there’s a vid of that as well, with a bonus touch & go on RWY 20 in order to log landings on both ends (#nerdlife)…
Anybody who has ever read anything on this website will know that I have quite a thing for rare, unusual and interesting general aviation aircraft; if anything, that’s kind of Achtung, Skyhawk!‘s whole deal 🤔 . And since I am also a lifelong “mediteranophile”, I have a particular soft spot for Italian, French and Spanish designs, mostly because their whole concept, style and technical solutions always seem to fly right into the face of the accepted Western norm.
So you can imagine that when offered the opportunity to fly an early, first-gen example of one of France’s best-selling piston singles, my interest was very much piqued. But when asked to also ferry it all the way from Spain to its new home in Croatia, my attention was definitely had! 😀
A little airplane’s big journey (yellows are Day 1; greens Day 2; blues Day 3)
Grandpa runs the marathon
But first, the customary Achtung, Skyhawk! preliminaries. The aircraft in question is a Morane-Saulnier MS.880B Rallye Club, manufactured in 1968 with the serial 1194 – which makes it part of one of the type’s earlier production batches, made just after the company morphed into the more well-known SOCATA in 1966 (though many documents would continue to use the original MS name for some time afterward). Unlike many of its kind, its life so far has been pretty hum-drum, having logged just under 5,800 hours with only four previous owners and two regs, the original OO-CLS and, from 2010 onwards, today’s D-EBKB. Really the only bit of excitement and genuine drama in its life was back in the early 80s, when it suffered a tail strike on landing that required the whole aft fuselage to be replaced.
Our mighty mouse being prepped for its final flight from its now former home. The previous owners had christened it “Virgen de Loreto”, Our Lady of Loreto, which I’m given to believe is the patron of aviation and air forces in Spanish-speaking countries. Given the ease with which we had made the entire flight, one could argue she was pulling double overtime!
In its original guise and with its original paint… and the old damaged fuselage in the back (photo from Airport Data)
Being a B model, it sports a 100 HP Continental O-200-A four-cylinder engine, the very same unit also found in the Cessna 150; combined with a Maximum Take-Off Mass (MTOM) of 770 kg | 1,700 lbs, on paper this gives it a very similar power-to-weight ratio and performance bracket to the 725 kg | 1,600 lbs late model 150. IRL however, the Rallye’s thicker wing profile and full-span slats do change the equation a bit, for while they make for measurably shorter take-off and landing runs, their extra drag means you do pay the price in the after take-off climb – particularly at the sort of high density altitudes common to continental Spain1. And while you can force the slats to close immediately after lift off in order to clean up the wing, to do so you have to accelerate to approximately 130 km/h | 70 kts (very near the 135 km/h| 73 kts best climb speed), which is not always possible without resorting to level flight, potentially throwing your obstacle clearance out of whack.
Haulage-wise, the standard fuel system (fitted to D-EBKB) is made up of two 52.5 liter |13.9 USG tanks, which give a total usable fuel of 94 l | 24.8 USG – though there is also an optional long range setup with two 92 l |24.3 USG tanks for a usable total of 170 | 44.9. With empty masses generally around the 500 kg |1,100 lbs mark, with full tanks the basic model has a respectable 190 kg |420 lbs left over for the payload, which today easily accommodates two modern adults with a bit of baggage2.
1 for the most part, the O-200 was considered perfectly adequate for the majority of operations, especially since it combined good fuel economy with reliability and ease of maintenance – all stuff that sounds perfect in marketing materials. However, to cater for the remaining minority that either required more poke or wanted an engine more suitable to their needs, Morane-Saulnier had also offered the:
MS.881, powered by the homegrown 105 HP Potez 4E engine (in variants 20, 20A and 20B)
MS.883, powered by the 115 HP Lycoming O-235-C2A
MS.884, powered by the 125 HP Franklin 4A.235.B3
MS.885 Super Rallye, using the 145 HPsix-cylinderContinental O-300 (versions A, B, C or D), as seen in the early Cessna 172
MS.886, with the 150 HP Lycoming O-320-E, and the
MS.887, with the 125 HP Lycoming O-235-F2A
Despite all this variety, most of these were produced in pretty much “token quantity”, with only the 883 and 885 managing to cross 50 examples (77 and 212 respectively if Wikipedia is to be believed)
2 being of 1960s design, the MS.880 was scaled to meet the sizes and masses of the people of the day – hence it being officially classified as a three-seater. And indeed, if you were a 70 kg male with a 60 kg wife and 30 kg kid, you could still take a full 30 kg of baggage, easily enough for a few days away. In 2022 though, the owner and myself – both on opposite sides of the 1.9 meter mark and pushing 90+ kg with our headsets, tablets, cellphones and cameras – were struggling to pack a change of clothes and clean underwear…
In light of these performance issues, we thought it best to attempt a bit of weight saving before departure. Up front thus went the heavy seat cushions, the carpet (which all on its own weighs some three kilos!) and the vacuum tube NAV/COM 2 radio…
… while out back, we ejected the rear seat upholstery in its entirety, the towbar, cargo net and all but the most essential equipment and tools (and a few quarts of oil). By the time we were finished, we had managed to throw out more than 20 kilos, a solid 4% of D-EBKB’s empty mass and equivalent to a full hour’s worth of fuel
The plane in Spain climbs poorly on the plain
Now time for the flight itself. As often happens whenever I start writing, my original idea of making just a simple “cheap & cheerful” photo story had quickly been thrown out in favor of a far more detailed work that would eventually take me three full days to write. Since this was the first time in my 20 full years of flying that I had done a ferry flight of this magnitude, I reasoned that a road map of my mental process during the planning stage might make for a much better read – especially since putting it down in writing would also provide me with a chance to sort out the experience and more thoroughly analyse both my initial preparation and my actual performance (and, of course, show off a couple of my best photos 😀 ).
So, to set the ball rolling, here’s a quick summary of the background to the whole operation. Back in early 2022, a friend from Lučko had told me that his son – a PPL(A) holder w/ helicopter experience – had bought an 880B as a personal time-building machine, and since he lacked the experience to fly it over himself, asked whether I would be willing to do the ferry with him. The aircraft was located at Cassarubios del Monte (LEMT) just to the southwest of Madrid, and would need to be flown to either its ultimate destination of Hvar (LDSH), or the intermediate stop at Lučko (LDZL) – all in all, a respectable great circle distance of 1,750 km |940 NM. The only “catch” was that we’d have to wait for April at the earliest for the paperwork to be completed and the airplane to undergo regular maintenance in preparation for the flight – which also gave me ample time to both request vacation time well in advance, and wait out the fickle spring weather, while still avoiding the hellish heat of full-on summer.
Having been given free reign to plan the whole thing as I saw fit, I set my airline OCD to 11 and then spent the better part of two weeks exploring various route options and fine tuning ideas until I was satisfied with the end result. While this may seem a bit over-the-top (especially since I was using flight planning software that did all the calculations for me), I was still wary of the fact that I had never done anything like this before – and that while I do have a ton of trans-European experience, the vast majority of it is in an airline environment, with five figure power outputs, comprehensive avionics, double & triple redundancy, another experienced crew member and Dispatch and Operations departments to call on. If anything, my airline experience had only served as a reminder of just how complicated planning could become (being on the receiving end of it), and just what can go wrong so easily and in such creative ways.
So, while pulling a few legs on a mobile app did indeed take just a couple of minutes, deciding where to pull them took up considerably more time. The legwork that I needed to do in choosing routes and airport stops was predicated by:
1. aircraft performance: as suggested previously with the 100 HP and thick wing, the 880B relies significantly on the curvature of the Earth to climb at higher altitudes and temperatures. So while the type’s “nearly STOL” credentials were not limiting in terms of runway length, they were a very real factor in clearing close-in obstacles and terrain, of which there are many along most of the Mediterranean coast. Compounding the problem was that with the two of us, our essential baggage and full (or nearly full) tanks, we’d be constantly operating at MTOM, further degrading our all-round performance and leaving us very little leeway. Thus, choosing airports for stopovers became first and foremost a question of being able to actually get in and out without undue sweating and swearing, and always being able to have Plans B through Z in case something goes to pot. For this reason, I focused exclusively on paved airstrips, where I could be reasonably sure that the surface held few surprises, and that we’d encounter less rolling resistance, fewer slopes and less chance of ending up stuck due to unfavorable weather
2. fuel and fuel consumption:the first stumbling block with this one was getting an accurate fuel burn figure; D-EBKB has no flowmeter, and I have had enough first-hand experience to take figures in the Pilot Operating Handbook with a grain of salt – especially given the airplane’s advanced age. The only thing I had to go on really was the previous owner, who from his own experience gave a figure of 26 l/block hour| 6.9 GPH at 2,500 RPM, giving around 140 km/h| 76 kts indicated in the cruise (which is a pretty high burn for that speed in O-200 terms). With 94 liters of usable fuel, he considered the realistic endurance to be around 3 hours 20 minutes, roughly on par with that of the Cessna 150.
However, while useful, these figures could also be a pretty sharp double-edged sword. The majority of D-EBKB’s previous flying had been done in highland Spain, which implies high density altitudes, prolonged climbing, and frequent operation at higher power settings – all of which have considerable influence on fuel burn and are not representative of all the conditions we’d be flying through on our way to Croatia. Then there’s also the previous owner’s flying style: how did he climb? how did he lean? how much weight did he carry? what altitudes did he cruise at? what were the average sector lengths? how would my own flying differ? and so on.
Unfortunately, since I had only partial answers to the above (there was a language barrier involved), I had to work with what was available – and then overlay that with a thick layer of additional protection. In combination with my desire to have a flexible and adaptable plan, the somewhat pessimistic fuel burn figure, and the small size of the Rallye’s tanks, this cushion had measurably reduced our possible flight times, adding yet more complexity to the planning. As on any of my own personal flights, my fuel plan was thus generally conservative, and on top of the required 45 minute reserve implied:
fuel to reach a realistically distant and realistically usable alternate that satisfied the same criteria as our destination (and not just the first sufficiently long stretch of runway that could take a Rallye)
contingency fuel equal to 15% of our trip fuel, as protection against higher-than-standard fuel burn, sub-optimal leaning, and my poor math & ham-fisted flying
and 20-30 minutes of additional fuel to cover issues like possible deviations off track, altitude changes (since we would mostly be sticking to 1,000 ft above ground), weather avoidance, stronger winds, and the possibility of holding at busier regional airports
What remained thus became the trip fuel. The upshot is that we ended up with possible flight times of up to 1 hour 40 minutes, which at 140 km/h make for approximately 250 km | 135 NM in one go. The issue here is that in parts of Spain (northeast) and Italy (northwest) there are not many airports within the distance that can readily fulfill our criteria, which naturally had a lot of bearing on both the choice of routes and the maximum flight time that we were willing to go to in order to avoid undue in-flight complications.
To illustrate just what sort of rabbit hole this can turn into, a fuel check and brief analysis after each flight revealed that our actual block consumption at said 2,500 RPM ranged from as much as 29 l/h| 7.7 GPH on the high plains down to as little as 21 l/h| 5.5 GPH along the coast, illustrating that a) a “one size fits all” figure is bound to be crap by default, and b) that with growing experience of the aircraft, careful leaning and as smooth a throttle operation as was possible in the conditions, we had managed to stretch our endurance by up to 30 minutes. Indeed, this better-than-planned fuel flow came in handy after we started encountering stronger headwinds over Italy, since we could now punch the RPM up to 2,650 and still meet our originally planned endurance figure despite a 31 l/h| 8.2 GPH fuel flow
3. aircraft handling: to expand on the previous paragraph, I also had to take into account my unfamiliarity with the Rallye (save for the couple of hours I’d logged on the bigger 150 HP MS.892 several years ago). Given the type’s pussycat behavior and the robustness and tolerances inherent to its design, this was not so much an issue of safety as it was of efficiency; any planning thus had to take into account that I’d need some time and at least a couple of legs before I even started hitting the performance figures in the POH, let alone getting the most out of the aircraft
4. weather: while the meteorological situation on a regional scale was important, so too were local conditions at and around our stopover airports, as well as at specific points en-route. For the first fifth of the trip, we’d be operating out of continental airports at 2,000+ ft above sea level, which – due to the absence of the sea’s stabilizing effect – experience considerable daily temperature variations. On the day before our departure, D-EBKB’s former home thus saw a temperature low of just 5° C at dawn… and a high of 35° C at 3 PM. This variation in density altitude and consequently aircraft performance would be keenly felt even with the 10,000 HP of the Q400, let alone the 100 of the Rallye. Thus, planning also hinged on using the morning chill as much as possible, and avoiding high terrain and obstacles during the high heat of noon (at least until we made it to the coast). Later on in the trip, the southern foothills of the Alps required their own approach – especially for their tendency to boil over with enthusiastic vertical cloud development – as did the fast-changing weather of the Genova Low. Finally, we’d have to cross the Velebit mountain range in Croatia, which has had a depressing number of aircraft carcasses litter its sides over the years – though here at least I could call on some of my own experiences of flying by over in aircraft with similar power-to-weight ratios
5. airport services: another issue that had to be balanced was the minimum level of airport service necessary, and avoiding complicated handling procedures common to larger airports (not to mention their traffic flows). While it may seem a stretch to claim that the Rallye needs some “minimum level of service”, being on a ferry flight and unfamiliar with most of the areas we’d be flying over, I had to take into account the possibility of change of plans due to weather, mechanical failures, in-flight re-planning, airspace closures and so on. So, the airports and airfields that I chose – destinations AND alternates – had to have:
a readily and commercially available supply of Avgas (since many smaller fields have fuel solely for their own purposes)
a flying club, airport operator or handling agent that could render logistical assistance
a maintenance shop with at least basic tools
acceptable accommodation nearby
and, for end-of-day legs, at least basic runway lighting
The availability of these services would have to be checked and confirmed by email and/or phone with each airport in turn, which alone had taken up almost two days. Further complicating things was that many regional airports in Spain and France (which are quite practical and very convenient) require prior permission or advance notice, which is doubly complicated when you aim to have a flexible plan that allows considerable space for improvisation should there be a delay or problem. The one thing at least that we didn’t have to worry about 95% of the time were customs and immigration, since all but the final leg were within the Schengen Area, and both of us have EU passports
6. rules, regs & local knowledge: passing as we were through unfamiliar territory, no detailed planning was practical until I had familiarized myself with the Aeronautical Information Publications (AIP) of Spain, France and Italy. While only a small fraction of that complicated mass of documents actually concerned us (general rules, VFR rules, VFR routes, airspace structure and such), they were still full of blind bends and loopholes that all had to be navigated in order to assure a stress-free trip.
Thankfully, I had much outside experience to call on here, starting with D-EBKB’s former owner (language barrier notwithstanding)… then Lukasz from Poland, who now actually lives in Spain, has had an 880B before and whose MS.892 I had flown and wrote about… and a friend from Lučko who flew his TB-20 and DA-42 pretty much all over Europe several times over. Such a huge mass of information was very welcome and gratefully received – but it still took some time to badger all of them with my stream of (occasionally stupid) questions and then process the results. Another good resource were various EU GA websites, as well as pilot reports within the flight planning app, which were often more revealing than all the docs in the AIP put together…
7. airspace configuration: another expansion of a previous point, and particularly applicable to southern France. Due to the large number of busy international airports and large military bases along the coast – Perpignan, Montpellier, Marseille, Nice, Cannes, Istres, Hyères – VFR transit routes over there are pretty restrictive both in lateral and vertical terms. To avoid causing a mess with commercial traffic on approach and departure, these routes limit light aircraft to between 500 and 1,000 ft above ground/water, which had to figure in available glide range and even the possibility of ditching and rescue
8. aircraft and system reliability: the big elephant in the room. “54 years old”, “first generation” and “trans-Mediterranean” may all sound full-on Achtung, Skyhawk! – but when you’re not typing that from a comfy chair and your ass is instead directly on the line, they take on a whole new kind of weight. Thankfully, much peace of mind was assured by the airplane’s excellent mechanical state (despite its tattered visual appearance), complete insight into its entire maintenance and damage history, a number of test flights prior to departure – and the new owner’s maintenance experience, which gave him a far more informed opinion than mine could ever hope to be. Props also go to him for indulging me in tearing apart the nose to check on the tautness of the throttle and mixture cables, something I’m quite touchy about given my past experiences on the 150…
In spite of these assurances, any planning had to take into account that the engine may go belly up at any moment – especially if it’s a bad one, as the patron saint of aviation, Murphy, is always teaching us. On overland flights, this included familiarizing myself with the terrain en-route (as much as I could online and without actually seeing it with my own eyes), and in flight keeping just a tiny bit closer to any formal airstrips where available – even if they’re intended for microlights only, since a short runway is better than no runway at all. Avoiding any extended overwater flight was as obvious as said water being wet (heh), even though it could not always be helped due to the aforementioned route restrictions. Lastly, the good thing is that both the O-200 and the original Rallye are so simple and robust that there’s really nothing on them delicate or fussy enough to break easily, which did go a long way to reducing stress levels in the cockpit.
The same approach also applied to the potential for on-board equipment failure, particularly the instruments and/or radios. To that end, we took along multiple mobile devices all fitted with the same flight planning software, as well as apps that use the unit’s GPS and internal gyros to simulate the Basic T should we lose any of the few primary instruments we had. Rounding all of them up was a powerful hand-held 8.33 MHz radio, as well as a set of torches, spare fuses and USB chargers to keep all of that tech fed
9. costs: ironically, a factor that made the whole operation into the non issue it turned out to be, and was a significant factor in my decision to take this flight on. As well as being given complete control over the flying side of the whole thing, I was also given pretty much a free hand financially, since the brief was “get yourselves home safely” and “price cutting doesn’t mean a damn thing if you’re dead”. However, while the financial considerations did thus drop to the bottom of the list of priorities, it would still be foolish and irresponsible of me to behave like a drunken millionaire, especially with current gas prices and inflation. Thus if I had a choice of two airports that offered the same level of handling and had the same (or very nearly the same) risks and benefits, I would tend to go for the cheaper option, particularly since I could usually arrange in advance to have available (and be charged for) only the services we actually needed. While this may sound highly specific, it was actually a common occurrence along the coast of France, with so many high quality GA airports on offer in a small area that you were spoiled for choice like a kid in a candy store…
ADDENDUM – 10. physiological factors: a frequently overlooked, but very pertinent, set of issues that should feature in any proper long-range planning – and which I had ironically overlooked (heh) when initially publishing this work. Yes, one of said issues was indeed coming to terms with the depressingly limited endurance of my bladder… but overall, they go so much further than that. Being a short-haul turboprop driver, I’ve had many an opportunity to experience first-hand just how much:
cockpit temperatures
vibration
noise
sitting position & seat quality
restricting elbow/leg/head room
unergonomic controls
exposure to sunlight
headphones + accessories
and the like have an influence on one’s performance during flight. The problem are not so much their individual or combined magnitudes – but the insidious effects of prolonged exposure to them that slowly, almost imperceptibly, erode your concentration, reaction time and judgement, while at the same time contributing to an increase in tiredness, irritability, forgetfulness, risk taking and the overall chances of royally screwing things up.
Like the Q400, the Rallye ticks pretty much all of the boxes mentioned. And while nearly 5,000 hours’ worth of exposure to them had definitely steeled me for the trip, these were still issues to be very wary of, and which had to factor prominently in both the maximum flight time and maximum number of legs we’d be willing to do each day (particularly since D-EBKB’s new owner had not gone through the same Regional Turboprop Meat Grinder, and would be expected to take the strain significantly worse than I). Since we were not pressed for time at any point during the trip, and had beautiful weather forecast for the entire week, I decided to adopt a similar approach to some airline scheduling departments, and start out strong and hard-hitting – but then progressively reduce the load and increase rest times as accumulated fatigue started to set in. As an upshot, Day 1 would thus see us do five legs for a total block time of seven hours – while Day 3 would whittle that down to just two legs and three block hours. Combined with an early arrival on Day 2 (6 PM) and late departure (11 AM), the latter had had significant beneficiary influence on our level of alertness and vigilance, especially important since we were a) due to cross the aforementioned Velebit mountain range on a windy day… and b) were within spitting distance of home and had to be on extra lookout for any “get-there-itis”
The Madrid-Zagreb Rallye
With the (not inconsiderable!) list of requirements finally reconciled, the end route ended up looking almost like a drunkard had planned it after a heavy binge session. The complete itinerary thus included:
DAY 1: Cassarubios del Monte (LEMT) •• Ocaña (LEOC) •• Requena (LERE) •• Reus (LERS) •• Girona - Costa Brava (LEGE) •• Béziers - Cap d'Agde (LFMU)
DAY 2: Béziers •• Le Castellet (LFMQ) •• Albenga - Riviera (LIMG) •• Cremona - Migliaro (LILR) •• Padova - Gino Allegri (LIPU)
DAY 3: Padova •• Portorož - Sečovlje (LJPZ) •• Lučko (LDZL)
And for how it actually turned out, here to tell the story are the best bits: the photos! 😀
Wind turbines, rolling hills and endless sun-burnt fields… the wonderful Spanish high plains in a nutshell. Their gentle nature, moderate elevations and ample space to land in case of engine trouble were the primary reasons for taking the longer southeastern route toward Valencia and then up the coast, rather than cutting directly northeast via Zaragoza and crossing Aragon’s Sistema Ibérico mountain chain
The “Looking Cool In Front Of Mountains” Starter Pack, first at Requena’s 2,340 ft and then Albenga’s 149 ft. While I do love both poses, they were actually borne out of necessity rather than aesthetics. D-EBKB has the type’s original (and temperamental) fuel system, in which both tanks are permanently interconnected; the fuel level between them thus takes some time to equalize, and if you fill both to full in quick succession on any form of sideways slope, fuel with soon start to vent through the underwing relief valves. So once refueling was done, we had to quickly reorient the airplane into a position where the wings could be as level as possible until the fuel settled – often with good visual results
High sun, scorched hills and a view full of navigation devices… perfectly sums up Day 1 in Spain! Though we were worried the exposure to direct sunlight through the transparent canopy would have a negative effect on the tablet (particularly in terms of heat), all devices remained cool and trouble-free throughout the trip, no doubt due to a helping breeze from the overhead ventilation grille
An off-beat airplane, a quirky panel, a calming sunset – and below us the beautiful Gulf of Lion (which we did not actually cross, but turned out to merely for the photo opportunity). The slats and this cockpit setup are probably my two favorite things about the early 880s; they just give them so much character and style. The visibility is epic… the whole cabin is airy and comfy… the instruments are a fascinating Anglo-French-US mix… the aux fuel pump switch and generator light look like Sean Connery’s Bond is about to pop up and use them… and most the levers have no sense whatsoever, since you push the throttle and mix to go – but pull the electrical master and cabin heat/vent knobs for them to do their thing
A suitcase in front of a personal airplane on a foggy dawn at a chic GA airport on the French Riviera… I feel like cut-price version of the Côte d’Azur jet set
Skirting the edge of the morning sea fog off the coast of Marseille. Like summer fog in Zagreb (and unlike the week-long blanket in winter), this one was extremely localized and cleared up within 30 minutes; indeed, visibility on the left was such that we almost saw Paris…
Being stuck at 500 ft all the way from Saint-Tropez to the Italian border meant we could at least enjoy the sights significantly closer up than usual… in this case the Cap du Dramont just off the picturesque town of Saint-Raphaël. Riviera cruising the proper way!
The Fueling Twin-Pak, Le Castellet at top & Cremona below. One of my more subtle planning failures was underestimating the time needed to refuel; no, not the actual process itself, but sorting out the bills afterwards. Same thing for landing fees; while not complicated in any way, it does take up more time than I’d expected, particularly since we were first-time visitors at all airfields en-route, and had to fill in extra paperwork as a result. Thus the 30 minutes that I’d planned for each stop at smaller airfields quickly turned into 45-60 (and more), except at Girona where we were all done in just 25…
Cruising by Venice Beach… no, not the one in LA, but the one near actual Venice. The abundance of sandy beaches – some miles long – that offered ample place to land in case of engine problems meant that following the coastline at the top of the Adriatic was a complete no-brainer, particularly since it added just 10 minutes to our flight time over a direct hop across the sea
Day 3 of 3, Leg 10 of 11, clear skies all the way, and familiar territory ahead… with as calming scenery as this, you can finally start to appreciate the magnitude of the whole trip, especially given our airplane’s sedate cruising pace and leisurely attitude to climbing
And finally (almost) home, parked at Lučko next to one of my daily drivers (sporting a brand new lick of paint now), just one minute after our planned arrival time. As mentioned previously, D-EBKB’s ultimate home will be Hvar Airfield on the island of the same name, but it will initially spend some time here at Lučko (where I had quite a bit of STOL fun with it in the meantime)
And finally, a little timelapse vid of one of the most scenic approaches of the trip (in pretty strong competition): the visual for RWY 09 at Albenga (sorry for the poor quality, the canopy is quite old + this was the only place I could put the camera without it rebooting due to vibration):
Totting up + lessons learned
So, when all was said and done, the end stats looked like this:
total block time: 17 hours 10 minutes
total time en-route: 75 hours 20 minutes| three calendar days
number of legs: 11
total distance covered: ~2,200 km | ~1,190 NM
average cruise ground speed: ~135 km/h |~73 kts
recorded ground speed extremes: 165 km/h |89 kts •• 75 km/h | 40 kts
elevation extremes: Ocaña(LEOC) 2,405 ft ••Portorož (LJPZ)7 ft
total fuel used: ~460 l |~122 USG (with RPM settings from 2,500 to 2,650 RPM)
However, much more important than any of these were the lessons I’d learned along the way. Since this was, as oft mentioned, the first time I’ve ever done a flight like this, it was inevitable that I’d make some missteps in the process, which – provided I lived to tell the tale – would allow me to both learn about myself and my (lack of) skills, as well as make for an interesting analysis of where I did good or bad.
The good is pretty obvious: we made it safely to where we needed to be. But, more than that, we had no significant operational issues along the way; we arrived at Lučko exactly to plan; we had no mechanical problems whatsoever (except a transponder that would overheat after six hours of operation); made no airspace infringements or AIP violations; and were more-or-less in our expected budget range. The entire trip was so smooth in fact that the biggest problems on our plate were cockpit temperatures, uncomfortable seats – and the nagging issue of our climb performance always fermenting somewhere in the subconscious. Indeed, we had commented more than once that we’d managed to cross half the Mediterranean with less fuss, delays and frustration than it sometimes takes to rent a Cessna 172 on a busy day and make a 30 minute panoramic flight (and that’s not an overstatement!).
Not only that, but the scale of what we’d done (in light of the performance limitations of the aircraft) has led to much professional maturing on my part, both by validation of the quality of my planning, and the realization of the amount of effort and foresight necessary to do it all by yourself… not to mention the sobering number of ways it could have all gone very wrong.
And now, for the more interesting part: the bad. While the amount of planning I’d invested was indeed the key to our carefree success, it would be foolish – and quite dangerous – to just pat myself on the back and leave it at that. As I mull over the whole thing a week later, I can identify several issues that would require more effort than I put into them, and that I’d definitely do differently if given the chance again:
trust your charts – but keep your options securely open: since even a cursory glance at the 880B’s performance tables had foretold the difficulties of operating at high masses and high temperatures, I took extra care to familiarize myself with both the terrain en-route, and around each stopover airport. Despite having studied numerous airport charts and satellite images, I was surprised more than once to realize just how… hmm… “colorful” the actual terrain really was, and just how misleading 2D (and even basic 3D) depictions could be. Area diagrams, VFR charts and Google Earth also did not accurately depict many obstacles further out along the departure path (such as trees, houses or power lines), which made for a few very lively take-offs up in the mountains, and considerable improvisation and re-planning right on the spot. So, while all of these tools are indispensable and definitely the basis of all planning, they are not the by-all-and-end-all – and should be looked at with a more critical eye and a full suite of backup plans and options
what goes up must come down: the vast open plains of Spain, clear skies and the rapid increase in temperature during the day are a sure guarantee of strong thermal activity, which can be a useful tool in aircraft with marginal performance; indeed, back in the times of skydive ops, it was not unusual to hitch a ride in them when climbing up to 10,000+ feet, since at those altitudes even a stripped out Cessna 182 could eek out just a paltry 200 feet per minute in the climb. However, since I was unfamiliar with the area’s thermal potential (and lacked the gliding experience to be able to judge it with what I would consider to be a sufficient level of precision), I decided to disregard them as an active factor and treat them as a hidden benefit. Unfortunately, despite some motorglider experience, I had failed to take into account that updrafts tend to be accompanied by downdrafts, which should then be classified as a “hidden danger”. This too made for some interesting initial climbing in Spain; and while I pretty quickly added their potential to the mix, it was still a fail on my part not to have considered them a problem right from the outset
optimistic ground stop planning: something I’d already touched upon in one of the photos above. While my plan included a lot of space for improvisation and soaking up delays, I was still working under the (misguided) assumption that ground handling would be a relatively smooth affair as it is in the airlines. And even though we had hit our 30 minute target a number of times, there were still several airports where we went significantly over the one hour mark. This was not so much of a problem on the scale of the entire ferry; rather, the issue was in reaching our overnight stop, where we had already booked parking space in advance to keep costs down. Case in point was the last leg of Day 1 (Girona-Béziers), where we made it in with just 15 minutes to spare on the ground service operator’s clock. And while all that would have happened had we scrubbed that leg and stayed the night in Girona was a hefty parking fee, more realistic planning could have avoided by a bigger margin a significant increase in costs without any compromise in safety or the overall timing of the flight
there’s no I in team: a point that particularly smarts given my airline background and its heavy emphasis on Crew Resource Management. The issue that bugs me here is not interpersonal or character-based; quite the opposite in fact, the trip was pretty much like a “boys’ night out”, but with airplanes. The problem lay in my own inconsistency and lack of delegation. When we started the trip, I insisted we do approach briefings, something ported over from the big cockpit and intended to keep both of us in the loop in a critical phase of flight. In this briefing, I would go over the most pertinent issues facing us at our destination – terrain, aircraft performance, runway characteristics, maneuvering areas, expected threats, … – with the purpose of giving the owner a clear idea of what my game plan was, getting his input, and helping him help me by assisting with traffic observation, frequency monitoring, navigation setup and so on. And that worked well… until we stopped doing them halfway into the trip. At first, the reason was simply us becoming more in sync as time went on, and starting to discuss such matters already en-route (albeit in a less structured manner); but later, it also became an issue of tiredness and a drop in novelty as we approached familiar territory (NE Italy, where I had flown a lot). The good thing at least is that the 880B’s asthmatic performance meant we never skipped a thorough performance and obstacle analysis before each flight, and were quite fastidious in agreeing to a suitable strategy for the after take-off climb. The other issue was the distribution of tasks between us. While I certainly did not do everything on my own like I’m a one-man-band – and the owner did sterling work on the ground, particularly handling and airport services – with hindsight I do note that I did do most of the in-flight stuff myself, despite having relied on the owner’s excellent ear for chatter on the radio. My core motivation at the time had been to both avoid breaking up my own single-engine mental flow as I grew more tired, and to avoid piling too much of a load on the owner, for whom this trip was a good deal more mentally exhausting than for me. However, I later realized this was counterproductive on a number of levels, since I had another person on board ready and willing to help (also point I went on about before we set off), and we were really never in the sort of conditions where his lack of flying experience would be a hindrance. If anything, a trip of this scale was pretty much a once-in-a-lifetime opportunity to gain experience you simply could not get in normal in-country flying, which would have been quite the useful educational tool had I used it properly
trusting mythology: this point has more to do with pre-departure aircraft familiarization than with actual planning, but is still a very important one to make. Having never flown an 880 before, I naturally did a few intro flights with the previous owner, who had had the aircraft for 10+ years, crossed a significant chunk of Western Europe with it, and was well versed in the particularities of operating both out of Cassarubios and Spain in general. And while his input after 35 years of flying was indeed very welcome and useful, I did feel that there were some elements of his handling of the 880 that fell into the category “do it like this, since we’ve always done it like that” – i.e. myths and half-truths passed down from generation to generation without analyzing in depth WHY it is done like that. Case in point were high weight take-offs from short runways, which flew into the face of many time-tested STOL practices – and were later, through experimentation on my part, proven to be at least partially false. My own fault here was taking the previous owner’s experience for granted – given he’s been flying for almost as long as I exist – without insisting I nevertheless try it my own way in controlled conditions and see if my ideas made more sense
Back to the world of grownups And finally, a well-needed dose of realism and perspective. While everything said so far sounds fine and dandy - and the trip was indeed a "working adventure" that every pilot should try at least once - it turned out that way solely for one overarching reason: the financial and operational latitude that I had been given. Without a set price target (just a general expected bracket and no obligation to stick to it in the interests of safety), I could plan as conservatively as I felt necessary, and put professional best practices at the forefront.
Had I been on a low grade commercial contract like some professional ferry pilots are, things could have been far less rosy, and chances are that my operational freedom would have been severely restricted. In such a case, it would have been entirely possible that I'd be forced by circumstance into cutting corners and pushing beyond my comfort zone, which would have both made planning far more difficult - and made the whole ferry itself a good deal more stressful, with a bigger potential for making a right old mess of it
Sources:
EASA – MS.880 family Type Certificate Data Sheet (PDF)
Changelog:
1 JUN 2022: added “Physiological Factors” to planning stage
Back in the summer of 2018, a sudden and quite powerful urge to photograph something really rare and interesting had seen me head for Budaörs Airfield (LHBS) in neighboring Hungary, where I had arranged to fly on the Goldtimer Foundation‘s stunning Rubik R-18c Kánya. An indigenous STOL design created by Rubik Ernő Sr – father of the same Rubik Ernő who would much later go on to design the eponymous cube – it was the last airworthy survivor of just nine made ever, making for a proper, full-on Achtung, Skyhawk! nerdout.
Fast forward to the summer of 2021, and the very same “eastern itch” had returned once again. Deciding, as before, to scratch it while the weather was still fine, I set off for Budaörs once again, intent on getting some air time on another Goldtimer classic, the magnificent and charismatic Polikarpov Po-2 biplane…
Smoke ’em if you ‘got em! To make the whole scene better, there’s a homegrown Rubik R-26 Góbé glider launching in the background, pulled along by 1960s Mercedes-Benz L series winch truck. The only blot on the landscape really is the SR-22…
A-maize-ing
For an aircraft that would go on to be produced in more than 40,000 examples and achieve so much in both peace and war, the Po-2 had an almost disappointingly straightforward birth. Gotten right straight out of the box, it was designed in 1926 by a young Nikolai Polikarpov (then aged just 34) and intended to be a cheap, simple, no-frills STOL utility aircraft that could be used for anything from basic flight training to crop dusting to reconnaissance and even combat. Flying for the first time on 24 June 1927, it would be designated as the U-2 in the Soviet system of the time (U – uchebnyy, trainer), and would quickly replace the successful but outdated U-1 – itself another Polikarpov design, reverse-engineered from an Avro 504K captured in 1919 during the Russian Civil War. The familiar Po-2 designation would appear only in 1944, and then as a tribute to its designer, who had died from cancer in July of the same year, aged just 52.
An entirely conventional wood-and-fabric affair, the U-2 would be made mostly out of plywood and pine (as common as trees, literally, in the USSR), with key components – such as the engine mounts, wing struts, bits of the cockpit frame and the landing gear – made either out of aluminium in the early versions, or significantly cheaper steel in the later models. Power was provided by the newly developed Shvetsov M-11 five cylinder radial, which produced 125 HP for take-off and 115 continuously in the most commonly used D and K versions – though the 160/140 HP M-11FR was also used on occasion.
However, what the U-2 could do with that power depended entirely on what it was actually meant to be, since each version – and there were many – had its own particular set of masses and speeds. Standard trainers were usually around 650 kg | 1,430 lbs empty and around 1,000 kg | 2,200 lbs at maximum take off mass, which made for a 150 km/h | 81 kts maximum speed, 130 km/h | 70 kts in a realistic cruise, and a ceiling of around 12,500 ft. WW II combat versions on the other hand weighed in at 750 kg | 1,650 lbs empty and up to 1,400 kg | 3,900 lbs full when bombs were carried, which resulted in a top speed of just 130 km/h | 70 kts, a 100 km/h | 54 kts cruise and a drop in ceiling down to some 10,000 ft. Take off performance had suffered as well, with the “heavies” reportedly needing a 50% longer take off run – though this needs to be put into perspective, since the standard trainers took barely 100 m to get airborne.
Despite a slow and pretty chaotic start to production in 1928 – sources quote missing diagrams, mismatching components, inadequate calculations, as well as understaffing and general improvisation at the factory level – the U-2 would find itself in widespread service already by 1930, starting first of all with the USSR’s major flight schools. Unsurprisingly, a number of “early days” issues were found along the way, including leaking fuel systems (w/ inevitable in-flight fires), main gear failures, cracks in parts of the fuselage structure and frequent engine overheating – though many of these would be cured in 1932 with the second production series, which also saw the addition of larger fuel & oil tanks, expanded cockpit equipment and a few extra amenities for the crew. But despite these problems, pilots spoke highly of their vice-free handling, particularly its low speed agility and a degree of longitudinal stability that was unmatched by anything else at the time (which made them highly spin resistant and easy to recover). Post-1932 examples were, however, rated slightly worse in general handling on account of their 20-30 kg | 45-65 lbs increase in empty mass – a not insignificant 5%.
Though there’s ample space laterally in both cockpits, you do tend to stick out vertically if you’re a bit taller. The extent of the Po-2’s simplicity was such that even the Vertical Speed Indicator (VSI) was an option; compared to that, HA-PAO is the decadent Deluxe Model, including posh stuff like Carburetor and Cylinder Head Temperature gauges. The back seat’s a bit more spartan equipment-wise and sports only an altimeter, VSI, Airspeed Indicator, Turn & Bank Indicator and compass
None of this, however, had managed to detract from the type’s enormous potential. During the course of my research for this piece, I’d managed to identify 34 separate versions introduced between 1932 and the end of Soviet production in 1952 – though the realities of flying (and fighting) in the Union inescapably suggest that there may have been many more, undocumented, unaccounted for and nowadays lost to time. Apart from the “bread & butter” training model, the two historically most notable are:
U-2AP / Po-2AP: the single-seat agricultural version that gave the type it’s Kukuruzhnik (maize worker) nickname. Produced in more than 9,000 examples, the AP had the front cockpit moved 25 cm forward and a 250 kg hopper installed in place of the rear seat, which could be used either for conventional crop dusting or aerial seeding. Other changes included strengthening the upper wing so it could accommodate a top-mounted fuel tank like the DeHavilland DH-82 Tiger Moth (as there was no longer sufficient space in its usual spot between the engine and cockpit), and moving the rear wing struts slightly to better cope with the new load distribution
U-2LSh: the most common combat model, used mostly for nuisance raids on German positions. The standard fixed weapon fit included just a single swiveling 7.62 mm ShKAS gun in the rear cockpit, while up to 120 kg of ordnance could be carried under the lower wing (usually two 50 kg FAB-50 bombs or four RS-82 82mm unguided rockets). The upgraded U-2LNB could carry a combat load of up to 200 kg, and was equipped with aiming spotlights to enable operations even in the dark – while the very similar U-2PTO was more of the same, but adapted to carry napalm canisters and other incendiary mixtures. These two versions would become famous as the main aircraft of the all-female 588th Night Bomber Regiment – the famous Night Witches – who would use them to great effect all the way from the Don Basin in 1942 to the Red Army’s storming of Berlin in 1945. Because of their resulting infamy, Po-2s of all sorts would become known to German troops as the Nähmaschine (sewing machine) due to the very characteristic tapping sound of the M-11 engine
While 1952 would mark the end of official production in the USSR, it would not be the end of the Po-2 itself; indeed, low-key assembly from spares in smaller factories and even by flying clubs would continue all the way until 1959, a full 31 years after its entry into service. What’s more, it would also be made under license in Poland as the CSS-13 (Centralne Studium Samolotów, Central Aircraft Study), initially at the WSK-Mielec plant near Rzeszow (1949-1950) and then the WSK-Okęcie works in Warsaw (1952-1955). Polish sources report that these differed slightly from the originals, sporting different ailerons, an elevator trim tab, upgraded main gear and various minor alterations to the structure; it is also mentioned that these changes had already been included in plans received from Moscow in 1947.
Unlike the originals, the CSS-13 would be produced in only two versions:
the stock trainer
and the CSS S-13, an air ambulance version with enclosed cockpits for the pilot, medical orderly and a single stretched that was roughly similar to the Union’s own U-2S / Po-2S. A single S-13 would be modified into the CSS-13P, a three-seat passenger model with two seats in the back, similar in concept to the original U-2SP
The actual production figures for the CSS are hard to nail down with precision, since they differ from source to source; but the most credible I’ve seen goes with 550 made in total, 180 at Mielec and 370 at Okęcie. Of the latter, 320 were the basic version and 50 were S-13s – though some sources mention that nine regular models had at some point been converted into ambulances, which would bring the tally up to 311-59.
Nikolai vs Ernő
But, despite its undeniable qualities as an airplane, the Po-2’s postwar association with Hungary came about not because of its capability – but squarely because of politics. At the heart of the matter was the Soviet system of planned economies, whose goal in the early 50s was to assert control over the newly-formed Eastern Bloc, and then use its considerable resources to help rebuild the USSR’s war-torn economy. To do this, emphasis would be put more on heavy industry than consumer goods, which necessitated using the existing infrastructure of the Bloc to its fullest and without regard for long-term consequences. This essentially resulted in each country mass producing only a limited variety of products – usually things they’d been good at before the war – which were then exported for use by both the USSR and the rest of the Bloc. At the same time, high tech and R&D would be consolidated to Russia proper, denying smaller countries the means of potentially outpacing Soviet plans and becoming less dependent and subservient to the Union’s whims.
As far as aviation was concerned, this meant that most of the big, fast stuff – fighters, bombers, heavy transports and airliners – would be designed and produced almost exclusively in the USSR, with satellite states left holding the other end of the market. With their history of large-scale light aircraft manufacture, Poland and Czechoslovakia (and, to a lesser extent, Romania) would take the lead by virtue of having the necessary infrastructure and experience already in place, and thus end up supplying the entire Bloc with training, touring, utility and light transport aircraft, as well as gliders and light utility helicopters. These could be either homegrown – such as the Zlín Z-26 family, and later also the Z-42, PZL-104 Wilga, M-18 Dromader, Let L-13 Blaník, L-200 Morava and the L-410 Turbolet – or in-demand designs from Russian manufacturers such as the Mil Mi-1, and from the 60s onward the Mi-2, Antonov An-2 and Yakovlev Yak-521.
1 indeed, virtually all series production of the Mi-2 and An-2 was undertaken in Poland (by PZL-Świdnik and PZL-Mielec respectively), as was the case with the Yak-52 and Romania’s Fabrica de Avioane Usoare (FCAv) at Bacău
For this system to continue to work to the USSR’s benefit, independent designs from “third countries” would need to be put into a disadvantageous position – particularly if they stood a chance of competing with the superstars – by using the greater output of those big factories to offer better availability, commonality and support. This would also help keep production centralized, controlled and running without interruption to keep up the illusion of progress. The rapid rise of Yugoslavia’s “dissident” aviation industry following the 1948 Tito-Stalin Split – which would eventually go on to design and produce everything from basic trainers to trans-sonic attack jets – was a potent reminder of the “dangers” of letting smaller states flex their potential and use it to slip from under Moscow’s control.
In Hungary, Rubik’s R-18 – which was a more modern aircraft running on the same engine and designed to do pretty much the same things – was thus pushed aside to make way for the Po-2, 20 of which would be acquired in CSS-13 form in 1954, all sourced brand new from Okęcie.
Then & now. Not a big time difference I know, but it is nevertheless good to see they’re both still flying together – especially considering they were at one point market adversaries!
Known sometimes as the CSS-13 Pacsirta (skylark), these would be delivered in two batches – serial numbers 0421-0425 and 0438-0451 – and would initially serve with the Hungarian Home Defense Association (Magyar Honvédelmi Szövetség, MHSz). Modeled on the USSR’s DOSAAF, the MHSz was a volunteer paramilitary organization that used various sporting activities – land, water and air – to train Hungary’s youth in a number of military skills that would come in handy in case of a capitalist invasion (a persistent boogeyman in socialist society). Like many similar organizations elsewhere in the Bloc, it used full-on military markings and nomenclature – so its CSS-13s, used by the air arm for basic training and flying competition, carried military codes based on the last two digits of their serial numbers.
Following the Hungarian Revolution of 1956, they would be handed over to the nation’s flying clubs (minus 22/0422 and 39/0439, lost in accidents), where they would be used for roles as diverse as training, taxi flights, glider towing and occasionally even skydiving. A number would even be converted into agricultural models using the same 250 kg hopper as the Po-2AS, but without its other structural modifications; these would be phased out already in 1960 due to the availability of more efficient machines such as the An-2 – and later the purpose built Zlín Z-37 (flying for the first time in 1963) and even the Kamov Ka-26 helicopter (flying in 1965).
By the mid 60s though, the rest of the 13s were beginning to feel the pressure as well. Having lost two more of their number – HA-PAM/0424 in a crash on 11 January 1959 and HA-PAV/0450 to a fire on the ground on 04 October 1960 – they would also come under attack by fresh designs from Russia and Czechoslovakia (such as the Yak-12A and Z-226) which, while more complex and expensive to run, came handsomely backed by a USSR keen to keep its hand in Hungary’s economy. Couple all of this to the 13s dwindling service hours and the costs of a possible lifetime extension, and the writing was very much on the wall: between 1966 and 1968, the entire fleet would be withdrawn and destroyed on the orders of the MHSz, with only HA-PAU/0443 and HA-PAO/0448 managing to escape the scrap man’s axe…
Life of PAO
Whereas PAU would eventually end up in the Museum of Military Aviation at Szolnok (LHSN) wearing period military colors, PAO would go on to lead a pretty exciting life. Having been used post-1956 as a glider tug at Dunaújváros Airfield (LHDV), it was supposed to be scrapped in 1968 along with the rest of the fleet; however, the airfield managed, Géza Jávor, and the airfield’s chief technician, Ráczkevy Béla, managed to covertly disassemble the aircraft and hide it in a nearby shed, hoping to keep it safe until it could be restored at some future date (this was actually quite a gutsy move in the climate of the time).
That future date would eventually come about in the early 80s, when PAO would finally be taken outside to see the light of day, and trucked some 150 km away to Kaposújlak Air Base (LHKV). There were two reasons for this move: one, it was the home to a major aircraft overhaul center operated by the Ministry of Agriculture’s Aviation Service (Mezőgazdasági és Élelmezésügyi Minisztérium Repülőgép, MEM-RSz) – and two, it was the workplace of Császár Károly, the base commander who had already made his name with restorations of vintage Hungarian wooden gliders, including the Rubik R-07b Vöcsök in 1981 and the Rubik R-11b Cimbora in 1982. With PAO having escaped certain death in such a dramatic fashion – and having been disassembled properly rather than just torn apart – restoring it to airworthy state was a complete no-brainer.
Led by Mr. Császár under the auspices of the MEM-RSz (the formal owner of the aircraft at the time), the restoration was completed in April 1984, just in time for it to be shown to the nation at the May Day parade in Budapest. Though it is nowadays, I believe, the youngest Po-2 in the skies, at the time it was the only airworthy example in the world, and as such was a common sight at airshows not just in Hungary, but further abroad as well; in 1985 it would even make it all the way to Switzerland and back, no mean feat at Po-2 cruising speeds!
It was at one such event – the Budaörs Airshow of 06 June 1986 – that Mr. Császár would, sadly, suffer a fatal heart attack near the end of his display routine. Having apparently already been trimmed for landing, PAO had managed to get down on its own near the western edge of the field, overrunning the airfield boundary and coming to a stop in what, at the time, was a small swamp. The Po-2’s low landing speed precluded serious damage, with just the main wheels and legs sheared off. Not long after Mr. Császár’s funeral, PAO would be airlifted out of the swamp by a Hungarian Air Force Mi-8 and quickly returned to airworthy condition.
Shadows of the past. PAO’s suitably loud tribute to both Mr. Császár and itself as we overfly what was once the very swamp it ended its flight in 35 years ago…
From that point onward, PAO would finally settle into a routine of well deserved stability, continuing (with a break or two) to run pleasure flights and impress crowds at airshows to this day. Indeed, the only significant post-1986 event was the end of socialism in Hungary and the subsequent dissolution of the state-run MEM-RSz in 1989. Now in need of a new home, PAO and HA-RUF – the R-18 that had started this entry – would soon pass to the Museum of Transportation in Budapest, which would then loan them long term to the Goldtimer Foundation following its formation in 1992.
This was, thus, the situation that greeted my when I arrived at Budaörs on a beautiful September afternoon, hungry for more noise and vibration than the Q400 could provide… 😀
Closing in on a soaring Scheibe Falke like a real WW I pursuit crew. That (deafening) noise… those vibrations… the wind… the smell of burning petrol… the droplets of oil flying backwards out of the exhaust… but most of all, all that sky… after 20 years in light aircraft, I still can’t remember when I’ve had so much fun in a (mostly) straight line!
When the Po-2 was first thrown into combat on the Eastern Front, opposing German pilots soon discovered that the minimum speeds of the Bf.109 and FW.190 (particularly the later, heavier versions) exceeded the maximum speed of a fully-laden Po-2. We had no such problems, however, in keeping up with the Falke, since we could both comfortably maintain just 80 km/h | 43 knots…
Dat air space. Normally when I fly the C172 or the Falke, I have the devil’s own time trying to get a clean shot through the open window or vent panels in the canopy; on the Po-2, that’s not really an issue! Looking back at Budaörs (and Budapest city in the distance) as we leave the pattern for some low level work. The sheer openness of the rear cockpit (the frame is actually below my shoulder blades) and just a basic period harness keeping you inside it not everyone’s cup of tea – hence the rear stick being removed to prevent passenger clutching to it during maneuvers
Low, slow & loud. True to its character, the highest speed I’ve seen the entire flight was just 145 km/h | 78 kts – and even that only in a shallow dive
With the “most open” thing I’ve flown being a Super Cub with the door down, I was naturally keen to see what would be the comfort level on an open-cockpit biplane. To my surprise, it was not the airflow as such, even though the windscreen provides only meager protection – it was the propwash, which spiraled around the airframe in such a manner that it was felt particularly strongly on the left side of the rear cockpit. Combined with that tappety five cylinder radial, life in the back was not really comfortable at full throttle noise- and wind-wise, and I was glad for the long sleeve shirt I’d brought along, despite it being a very agreeable 26 degrees Centigrade at altitude
Just a Kukuruzhnik doing Kukuruzhnik stuff…
Some old school “I Follow Roads” navigation with Mr. Krauth Peter, whose career at the now-defunct Hungarian state airline MALÉV spanned almost 30 years. Seven decades worth of biplane, my first open cockpit flying experience, beautiful weather – and an fellow airliner driver to chew the fat with on the ground… can’t beat that for a Saturday afternoon out!
As always, I would like to extend my sincerest thanks to Goldtimer Foundation members Mr. Krauth Peter and Mr. Janos Zoltán– the former for a fantastic flight, and the latter for sharing so much about PAO’s history!
Even though light aircraft had remained faithful to Croatian airports all throughout the corona crisis – so there was always something to see wherever you went – the recent and quite sudden upsurge in tourist traffic had brought them back in numbers unseen even in record-setting 2019. From Pula (PUY/LDPL) at the top of the coast to Dubrovnik (DBV/LDDU) at its bottom, throughout July 2021 I was spoiled for choice on any GA apron, and more than once did not know where to actually start photographing (a #firstworldproblem if there ever was one). Homebuilts… turboprops… bizjets… touring… STOL… medevac… everywhere you went there was always something for any taste.
I, however, decided to indulge in a particular fascination with piston twins (a summer fling?), of which there were so many that I could easily devote an entire article to them – and, in fact, am doing right now. And while just a handful of them could be considered truly rare and interesting – even by Croatian standards – they should nevertheless make for a fun read for any GA nut!
An interesting airplane, a fine background and an electrically-assisted bike to get around the apron… the GA-loving Dash Driver’s summer vibe! And although it is not actually part of the this work (the covers ruin it for me), I can still tell you that this is a mint 1975 Partenavia P.68B Victor with the serial 00035, one of the many designs penned by brothers Luigi and Giovanni Pascale – the same duo that would later go on to found (and still run) the more famous Tecnam works
1. Piper PA-44-180 Seminole • F-GBPK
The first machine off the line may be the most common of the lot – but for reasons I can’t quite explain, I have a soft spot for Seminoles, particularly mint and sweet examples such as this one (though my colleagues were quick to point out that “sweet Seminole” is like saying “enjoyable tropical disease”).
Before taking selfies on the one on the left, you first need to leave a lot of sweat on the one on the right. While much maligned by students for its wheezy single-engine performance, lack of creature comforts and very many quirks, the Seminole is a real anvil of an airplane underneath, and can take so much abuse that a lesser aircraft would long before split in half. That said, having done my Multi Engine training on a nearly identical 1978 example, I was quite surprised at how potent the design becomes when fitted with a pair of turbos, with the 1982 Turbo Seminole I did my recurrents in feeling like a proper rally version!
Manufactured in 1979 under the serial 44-7994308, F-GBPK is seen here roasting at Split Airport (SPU/LDSP) after completing stage 2 of an epic trans-mediterranean journey that will see it cover everything from France to Croatia to Greece to Morocco to the Azores, before legging it back home across the entire width of the Iberian peninsula1. Having previously flown for the Aeralp flight school of Grenoble, F-GBPK sports a comprehensive avionics setup, including the Garmin G500 glass cockpit system, twin Garmin GNS430 moving-map GPS units, a King KRA10 radio altimeter, and a full suite of backup analogue IFR instruments – all of which makes for far more relaxing long-range flight!
1 as originally planned, the whole itinerary reads: Grenoble (LFLS) – Bologna (LIPE) – Split – Ioannina (LGIO) – Heraklion (LGIR) – Megara (LGMG) – Kefalonia (LGKF) – Valletta (LMML) – Pantelleria (LICG) – Palermo (LICJ) – Olbia (LIEO) – Menorca (LEMH) – Malaga (LESB) – Fes (GMFF) – Agadir (GMAD) – Lanzarote (GCRR) – Tenerife Nord (GCXO) – Madeira (LPMA) – Cascais (LPCS) – Biarritz (LFBZ) and then home. At the time of writing, the aircraft had reached Tenerife, roughly 3/5ths of the way in (with a tech stop on Corsica for some maintenance)
A simple, elegant and clean scheme that makes it look far younger and crisper than it actually is. An interesting detail are the three-bladed props (unusual on naturally aspirated Seminoles), which briefly gave rise to the hope that it could be another Turbo model…
2. Piper PA-34-200 Seneca • F-BTMH
No. 2 on the list is another “Frenchie Piper” – but this time one considerably rarer than the Seminole. Even before you look at its serial 34-7250135 – which denotes it as the 135th PA-34 made in 1972 – you’ll note the square windows, the square engine nacelles and the two-bladed props, and immediately recognize it as The Daddy: the first ever Seneca model to go into series production…
The fresh paint job may fool the eye initially… but the angular design quickly gives it away! Made a beeline for it immediately, despite much bizjet eye candy in the background…
As the only Seneca variant to be powered by naturally aspirated engines (Lycoming IO-360s with 200 HP apiece), and sporting a limited payload of just 1,356 lbs | 615 kg (of which 590 lbs | 260 kg is fuel with full tanks), this model was neither overly efficient nor a spirited performer, particularly when on the heavy side and at high ambient temperatures. Quickly surpassed by the more capable turbocharged Seneca II and then the 220 HP Seneca III, the original has nowadays found its niche in the world of flight training, where loads (usually just a student + instructor) are never such that its lack of performance becomes an issue… even on only one engine. Cheap to buy, often with comprehensive avionics setups and big & complex enough to give the student an idea of what it’s actually like to handle an airliner, they can be a realistic alternative to Seminoles and Beech Duchesses, with F-BTMH itself flying in that role with the Sky Explorer flight school of Aix-en-Provence.
To make it even better, it is also only the third of its type I’ve ever seen, alongside the even older YL-ATB and Croatia’s own 9A-LEM. Ironically, given my fascination with it, I now have more photos of the rarest Seneca mark than I do of the common-as-trees Seneca III or the still-in-production Seneca V!
Looking quite cool in the fading light at Dubrovnik. Other interesting bits about F-BTMH are the baggage door window (which became standard only on the Seneca III, but was offered as a retrofit on the original and Seneca II) – and the fact that it has carried its identity since new, not something you see often in GA!
3. Beech 58P Pressurized Baron • N333RF
Third plane’s the charm however – not only for being my first Pressurized Baron, but also for being the only pre-G58 model I’ve ever seen in the metal (Barons of any sort are a pretty rare sight over here in SE Europe)…
It may not be the prettiest twin out there… but that classic teardrop shape is hard to miss on any apron! Developed in 1969 out of the original (and quite pudgy) model 55, the 58 received a 10″ extension of the nose, larger cowls for its more powerful 285 HP IO-520 engines, and a slightly wider wheelbase – all of which contributed to its famous regal stance. Other mods include redesigned cabin windows, split cabin doors on the right side of the fuselage, and a cleaner, re-profiled and relocated panel
The most advanced evolution of Beech’s hard-to-kill twin, the 58P was part of a double act with the unpressurized 58TC, both of which were intended to bolster the type’s sales prospects in the face of new designs from Cessna and Piper. Conceived in early 1973, the 58P ended up being the “marketing department’s airplane”, since it was pushed into development over the objections of the company’s engineering circles, who felt that Beech already had a perfectly adequate high-performance pressurized six-seater – the stunning model 60 Duke. Whats more, at the time the Duke was still holding its own against the only realistic competitor in this segment – Cessna’s 421 Golden Eagle – so it was felt that a pressurized Baron would just undercut the Duke’s sales for no tangible gain. However, strongly positive feedback from sales personnel across the US eventually prevailed, and work soon started on turning the already capable 58 into a Mini Me Duke.
Flying for the first time on 16 August 1973 in the form of a development prototype, the new 58P – as certified in 1974 – was powered by twin Continental TSIO-540-L engines developing 310 HP, whose massive turbochargers could supply enough high pressure air to give a 25,000 ft ceiling, power the pneumatic de-ice boots on the wing and horizontal stabilizer AND pressurize the cabin to a maximum 3.7 psi cabin differential. At the type’s usual cruising altitude of 18,000 ft, the latter translated into a very comfortable 7,700 ft cabin altitude (round about what you get on most airliners) – or a tolerable 11,900 ft at the 25,000 ft ceiling.
At this maximum altitude, the 58P could do 213 kts | 394 km/h in high speed cruise, which doesn’t sound all that impressive compared to the 200 kts | 370 km/h of the stock 58 – and on the original 285 HP engines to boot, well before the 1984 upgrade to 300. However, the stock model achieved this at a pretty low 7,000 ft, well below many safe altitudes in the Western US and Alpine Europe. So, despite objectively being some 75-80% of the way to the bigger and more comfortable Duke, as it went on sale in 1976, the 58P sold 83 examples in the first year alone – not a big number on its own, but quite a success for that market segment.
Despite a number of changes under the skin, from the outside the 58P is, at a glance, almost indistinguishable from the regular model. The only major giveaways are the additional scoops and vents on the cowls – and a single cabin door on the left side, relocated there to avoid creating a structural weak spot and undue pressurization stress in tandem with the crew door
Meanwhile, as test flying and certification were being wrapped up, Beech executives realized that they could use the work done on the 58P to try and break into another niche: unpressurized twins, where Cessna’s 401/402/411 and the Piper Turbo Aztec had cornered the market. To this end, they created the 58TC, which was in essence a standard 58 fuselage and wings mated to the complete engine installation of the 58P, rather than being a 58P with the pressurization system removed (so it retained the right side cabin door). The only other major difference to the standard model were equipment levels; since the 58TC could fly far higher than the stock 58P, it was equipped as standard with the de-icing system, and sported more cabin amenities and an extended IFR cockpit setup. Long range fuel tanks were also a very common option, to cater for the TSIO-520’s higher thirst.
In 1979, both the P and TC received an engine upgrade, swapping the original L model engine for the more potent TSIO-520-WB, now developing 325 HP. The upgrade also saw the P’s maximum pressure differential increase to 3.9 psi, and the top speed to jump slightly up to 216 kts | 400 km/h.
Given the number of unpressurized turbocharged twin types still flying today – Senecas, Cessna T303s, Turbo Aztecs and the like – one would have expected that the 58TC would also be a sales success. Despite being considerably cheaper, less complicated to operate and easier to maintain than the P, the TC was a complete flop, with just 151 sold before production stopped in 1982. While it was easier to live with, it was still more expensive to buy and fuel than its rivals, and despite having roughly the same performance as the P, it did not provide the same level of passenger comfort. As a consequence, the P would outsell it nearly three-to-one, with 495 built by the time production ended in 1986 during the big GA slump.
N333RF itself is an early 1977 example sporting the serial TJ-92, which says it is the 92nd P-Baron made (prototypes included). A quick search online revealed that it had been put on sale in the States back in mid-2020, and the fact that it has found its way to Dubrovnik means it has likely found a new home somewhere in Europe…
It’s not just the shape… it’s also the correct “brown & browner” 70s paint scheme. Despite being an early model, N333RF has beenretrofitted with the WB engine by RAM Aircraft, and also sports the optional 196 USG | 742 l long range fuel tanks. Other stuff includes the Garmin GNS530 + 430 moving-map GPS units, the Avidyne Flight Max EX500 MFD, a Bendix King ART161A weather radar and a dated – but still perfectly adequate – Collins AP-107 autopilot
4. Cessna 414 RAM VI • N414SB
Compared to the 58P, the final aircraft for today was a far bigger sales success, with some 1,070 sold… but many people will still struggle trying to identify it. One of the many designs churned out by Cessna during its 60s and 70s market fight with Piper and Beech, the 414 is essentially a quick-and-cheap mishmash of parts from the earlier models 401 and 425, and was primarily intended to take over the Golden Eagle’s job of keeping the Beech Duke in check.
Despite its bright paint job, N414SB is the type of aircraft you could lose on any bigger apron. I myself had initially called it as a 401 or 402, until I had gotten close enough to read the tip tank…
Though it would eventually win and by quite a margin – outselling the Duke’s 596 by almost two-to-one – its lackluster looks and unglamorous origins had quickly made it fall behind the sofa of public consciousness. This, however, does not mean it was a bad aircraft; on the contrary, it would prove to be as tough, capable and long-lived as the 58P, and would in later years become a favorite for third-party upgrades.
N414SB itself – of 1970 vintage & serialled 414-0092 – thus sports the RAM Series VI mod, which sees the original Continental TSIO-520-J engines of 310 HP replaced by TSIO-520-NB units developing a more meaty 335 HP. Apart from a 10-15 knot bump in cruising speeds (depending on the regime), the upgrade also includes a 415 lbs | 188 kg increase in payload – and, despite the added mass, an increase in climb speeds from 1,580 to 1,900 FPM on both engines, and 240 to 310 on just the one.
The Series VI upgrade normally also includes new scimitar-type propellers – but the owner(s) of N414SB had decided to go one up and fit Hartzell’s odd-looking Q-Tip units. Occasionally mistaken for propstrike damage, the Q-Tip shape in essence behaves just like a winglet, increasing efficiency and thrust while reducing noise, vibration and fuel consumption. However – as is the case with Mazda and its pushing of the Wankel engine – the Q-Tip’s actual gains (particularly on a cost/benefit basis) are still fiercely debated online, with discussions on forums often growing quite heated and passionate…