Frise aileron

American  

[freez] / friz /

noun

Aeronautics.

1. an aircraft wing control surface designed with its leading edge extending forward of its axis of rotation so that when the aileron's trailing edge is raised, the leading edge extends below the bottom surface of the wing.

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Etymology

Origin of Frise aileron

First recorded in 1930–35; named after Leslie G. Frise (1897–1979), British engineer