Cooper vane
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English
[edit]Etymology
[edit]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
[edit]Cooper vane (plural Cooper vanes)
- (aviation) A mechanical aerodynamic wedge that prevents the ventral airstair of an aircraft from being lowered during flight.
Further reading
[edit]- Cooper vane on Wikipedia.Wikipedia