Cooper vane

English

Etymology

After Dan Cooper, the false name used by an unidentified hijacker who used the rear stairway to exit a Boeing 727 in flight and escape using a parachute.

Noun

Cooper vane (plural Cooper vanes)

1. (aviation) A mechanical aerodynamic wedge that prevents the ventral airstair of an aircraft from being lowered during flight.

Further reading

• Cooper vane on Wikipedia.Wikipedia