回かい転てん翼よく

noun

rotary wing; rotor

Technical term for the rotating wing of a helicopter or similar aircraft. Often contrasted with 固定翼 (fixed wing).

See also: 固定翼 (こていよく)

• ヘリコプターの回かい転てん翼よくが大おおきな音おとを立たてて回まわっていた。

  The helicopter's rotor was spinning with a loud noise.