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The flap may form part of the upper surface of the wing, like a plain flap, or it may not, like a split flap, but it must slide rearward before lowering. As a defining feature – distinguishing it from the Gouge Flap – it always provides a slot effect. The flap was invented by Harlan D. Fowler in 1924, and tested by Fred Weick at NACA in 1932
The Gouge flap, is a type of aircraft flap, which moves on a track when raised or lowered; in level flight. Invented by Arthur Gouge of Short Brothers in 1936, it allows pilots to increase both the wing area and the chord of an aircraft's wing, thereby reducing the stalling speed at a given weight. This provides benefits including a shorter ...
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.
A flaperon (a portmanteau of flap and aileron) on an aircraft's wing is a type of control surface that combines the functions of both flaps and ailerons. Some smaller kitplanes have flaperons for reasons of simplicity of manufacture, while some large commercial aircraft such as the Boeing 747 , 767 , 777 , and 787 may have a flaperon between ...
A specialised and patented flap arrangement, known as Gouge flaps after their creator, was employed on the Empire to increase wing area with only a small increase in drag and without heavy disrupting airflow over the top of the aerofoil; in operation, the lift coefficient of the wing could be increased by 30 percent, reducing the landing speed ...
KLM Fokker 70, showing position of flap and liftdumper flight controls. The liftdumpers are the lifted cream-coloured panels on the wing upper surface (in this picture there are five on the right wing). The flaps are the large drooped surfaces on the trailing edge of the wing.
A single surface on each wing serves both purposes: Used as an aileron, the flaperons left and right are actuated differentially; when used as a flap, both flaperons are actuated downwards. When a flaperon is actuated downward (i.e., used as a flap), there is enough freedom of movement left to be able to still use the aileron function.
The wing root fairing of an American Aviation AA-1 Yankee. An aircraft fairing is a structure whose primary function is to produce a smooth outline and reduce drag. [1]These structures are covers for gaps and spaces between parts of an aircraft to reduce form drag and interference drag, and to improve appearance.