Another interesting feature are the wingtip fences, which prevent high pressure air below the wing from spilling over the wingtip into the low pressure air above (similar to the winglets of a larger aircraft). Left uncontrolled, this spillover would eventually detach from the wing in the form of turbulence – the infamous wingtip vortex – drastically increasing aerodynamic drag. A similar setup is – uniquely – found also on the horizontal stabilizer.
