autogiro
/ˌɔːtəʊˈdʒaɪərəʊ/(亦作autogyro)
noun
(pl. -os)
- a form of aircraft with freely rotating horizontal vanes and a propeller. It differs from a helicopter in that the vanes are not powered but rotate in the slipstream, propulsion being by a conventional mounted engine.自转旋翼机。
词源
1920s: from Spanish， from auto- 'self' + giro 'gyration'.