Flaperon

Boeing 777 flaperon
Flaperons on a Denney Kitfox Model 3, built in 1991
Flaperons (Junkers style) on an ICP Savannah Model S, built in 2010
Operation of the flaperon of a Boeing 777 during left and right banking

A flaperon (portmanteau of flap and aileron) on an aircraft wing is a type of control surface that combines the functions of both flaps and ailerons. Some kitplanes have flaperons for simplicity of manufacture, while large commercial aircraft such as the Boeing 747, 767, 777, and 787 may have a flaperon between the flaps and aileron. The 787 has a SpoileFlaperon that combines the action of spoilers, flaps and ailerons into one control surface.