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Fowler flap

noun Aeronautics.
  1. a flap normally forming a part of the trailing edge of an airplane wing, capable of being moved backward and rotated downward in order to increase lift through increased camber and wing area.
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Origin of Fowler flap

named after Harlan D. Fowler, 20th-century American aeronautical engineer
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018