Trip hazard (aerodynamics)

Trip hazards are deliberately arranged changes to the wing profile (especially) of smaller aircraft .

With the help of these stumbling edges, an uneven flow separation is created on the wing in slow flight, which in turn leads to the aircraft shaking. This informs the pilot of the beginning stall and the associated loss of lift.

Trip hazards are particularly necessary on wing profiles with a high aerodynamic quality, since otherwise the entire wing would stall almost simultaneously without any noteworthy advance warning.