Leading-edge slat
A leading-edge slat is a high-lift device that moves away from the wing leading edge to form a slot.
- Where it is
- Along the leading edge of each wing in the generic transport-aircraft model.
- What it does
- The slot helps the wing sustain attached airflow at a higher angle of attack and delays the stall.
- Relationship
- Slats complement trailing-edge flaps in the high-lift system, but they act at the wing’s leading edge.
- Common confusion
- A slat is not a trailing-edge flap. The slat opens a leading-edge slot; the flap changes trailing-edge camber and often wing area.
Check yourself
Without looking back, can you explain where the leading-edge slat is, what it does, and which component drives it or is driven by it?
Scope: Generic transport-aircraft teaching model. Reviewed 2026-09-09.