English Explanatory Dictionary

Cooper vane

English dictionary entry

Meanings

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

Word forms

Cooper vane Cooper vanes

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.

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