An aerodynamic control surface located on the front edge of a wing that pivots downward to increase the wing's camber. Unlike slats, which create a physical gap for airflow, a droop leading edge remains sealed against the main wing structure, delaying stalls during high-angle-of-attack maneuvers like takeoff and landing.
Check the leading edge droop mechanisms during the walkaround to ensure there's no hydraulic fluid leaking.
Also heard as
- droop leading edge
- droop snoot
Do not mix it up with
- Slat: A slat opens a physical gap to let high-pressure air flow over the wing, while a droop simply hinges downward without creating a gap.
Related terms
Slat
An aerodynamic surface on the leading edge of a wing that extends to increase lift at low speeds.
Flap
A hinged surface on the trailing edge of an aircraft wing used to increase lift and drag.
Leading edge
The forward-facing contour of an airfoil that first meets the oncoming air.
Control surface
A movable aerodynamic flap or panel used to steer and stabilize an aircraft in flight.