A Krueger flap is a type of leading-edge flap that pivots forward and outward from the bottom of the wing. When deployed, it increases the wing's camber and maximum lift coefficient, allowing the aircraft to fly at slower speeds during takeoff and landing without stalling. Unlike slats, which create a slot for airflow, Krueger flaps simply extend the leading edge downwards.
Maintenance found a hydraulic leak in the actuator for the inboard Krueger flap.
Do not mix it up with
- Slat: Slats extend forward to create a gap for high-energy air to flow over the wing, while Krueger flaps hinge down from the bottom to increase camber without a slot.
Related terms
Flap
A hinged surface on the trailing edge of an aircraft wing used to increase lift and drag.
Slat
An aerodynamic surface on the leading edge of a wing that extends to increase lift at low speeds.
Leading edge
The forward-facing contour of an airfoil that first meets the oncoming air.
Fowler flap
A type of wing flap that slides backward before hinging downward.