with the Krügerklappe (English: leading edge flaps, more rarely: Kruger flap) concerns it an aerodynamic aid at a wing of an airplane, which improves the low-speed characteristics. The Krügerklappe is at the front bearing area lower surface and is in its effect with a slat comparably, however in the execution simpler. The two lift assistance are also combined. Another form of the Krügerklappe is used for example with airplanes of the type airbus A300 and A310. These machines have normal slats, for a clean aerodynamic transition between these and the trunk possess them small Krügerklappen in trunk proximity.
By Krügerklappen also the flow separation speed beside the coefficient of lift and the wing area (stable speed) increases. Therefore they are often used with swept wings, whose current in the slow-speed flight would tear off otherwise at the wingtips. As a result of earlier flow separation at the trunk side a higher aileron efficiency up to flow separation arises, in addition the pilot keeps an aerodynamic feedback over the Buffeting punctual - as the replaced turbulent current the horizontal tail unit brings to vibrating. (For this reason T-Leitwerke contain in principle the danger superstable, there the horizontal tail unit more highly than the wing attached are there)