plain flap

plain flap

A form of wing flap in which a portion of the trailing edge of the wing folds down to increase the camber of the wing without increasing the wing area. See flap.
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Contract Awarded for envelope, transparent; map, plain flap, 460mm long by 305mm w, w/2 overlays
The plain flap uses a simple hinge point, allowing the wing's trailing edge to droop as a single unit.