TIARA4D A leading-edge slot is a spanwise gap in each wing, allowing air to flow from below the wing to its upper surface. In this region of high local airspeed, skin friction (viscous force) is very high and the boundary layer arriving at the slot on the upper wing has lost much of its total pressure (or total mechanical energy) due to this friction. Partial-span slots are usually found only on the outboard portion of the wing where they ensure airflow over that portion of the wing will remain unstalled at higher angles of attack than the inboard portions of the wing. Full-span slots are generally found on Short Take-off and Landing STOL aircraft like the Fieseler Storch, Dornier Do 27, PZL-104M Wilga 2000, and Zenair CH 701 STOL.|Formula Satu Musim 1976