liikumatu seade tiiva esiservas, mis võimaldab tiiva aerodünaamiliste omaduste säilitamist väikestel lennukiirustel ja suurtel kohtumisnurkadel, an aerodynamic feature of the wing of some aircraft to reduce the stall speed and promote good low-speed handling qualities. A leading edge slot is a span-wise gap in each wing, allowing air to flow from below the wing to its upper surface. In this manner they allow flight at higher angles of attack and thus reduce the stall speed.