slotted flaps

slotted flaps

slotted flapsclick for a larger image
A type of trailing-edge flap. These may be single, double, or triple slotted. They form a slot(s) between their leading edge and the inside of the flap well in the wing. The resultant airflow helps to control the boundary layer, resulting in higher maximum lift but not so much increase in drag. The stalling angle also increases considerably.
References in periodicals archive ?
As discussed in the sidebar below, slotted flaps actually are made in two or more panels, with space between them allowing air to pass through.
Fixed slots were added to the stabilator's forward portion, delaying onset of a stabilator stall in the same fashion slotted flaps help the wing generate lift.
Common types include the Fowler flaps of a Cessna 172, slotted flaps of a Piper Cherokee and split flaps of the Cessna 310.
Fowler and slotted flaps, for example, can produce a considerable performance change when retracted during a steep climb; the culprit is the progressive reduction in lifting area through the return to normal camber and chord--the amount of lift available suddenly decreases.