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Fowler flap diagram. The Fowler flap combines a translation and a rotation. The flap splits and slides backwards, then rotates down creating one or more slots. These movements increase the wing's curvature which increases cord and camber. [3] The high-lift Fowler flap is located on the trailing edge of an airplane wing which increases wing area ...
Top left: All surfaces at neutral position; Top middle: Right aileron is lowered; Top right: spoilers raised during flight; Middle row: Fowler flaps extended (left), extended more (middle), hinged with inboard slotted part hinged even more (right); Bottom row: spoilers raised during landing
Flap: a hinged aerodynamic surface, usually on the trailing edge, which is rotated downwards to generate extra lift and drag. Variations include plain, slotted, and split flaps. Some, such as Fowler Flaps, also extend rearwards to increase wing area. The Krueger flap is a leading-edge device.
The most common high-lift device is the flap, a movable portion of the wing that can be lowered to produce extra lift. When a flap is lowered this re-shapes the wing section to give it more camber. Flaps are usually located on the trailing edge of a wing, while leading edge flaps are used occasionally. There are many kinds of trailing-edge flap.
Note the flaps cover the entire trailing edge. The He 177 had Fowler-type extensible trailing edge flaps, which covered the trailing edge of the wing, including those portions covered by ailerons. Each aileron comprised upper and lower portions, the latter arranged to slide rearwards with flap extension, while the upper part retained its ...
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