…When the propeller of a broken engine on a multi-engine aircraft spins like a windmill, it can damage the broken engine and cause resonance with the wings. To prevent this, feathering propellers were developed that allow the propeller blade angle to be parallel to the direction of flight. These have further evolved into reverse pitch propellers that have the function of generating negative thrust (resistance) by making the pitch negative when the aircraft lands, thus acting as a brake. Propellers have been used as propulsion devices for airplanes since the first flight by the Wright brothers. … *Some of the terminology used to refer to "reverse pitch propellers" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…多発機体で故障したエンジンのプロペラが風車となって回転すると,故障したエンジンをいためたり,主翼などとの共振を起こす。これを防ぐため,プロペラの羽根角を飛行方向と平行にすることができるようにしたフェザリングプロペラが開発され,さらに飛行機の着陸時にピッチを負として負推力(抵抗)を発生し,ブレーキ作用を行わせる機能を併せもつ逆ピッチプロペラへと発展してきた。 プロペラはライト兄弟による初飛行以来現在に至るまで飛行機の推進装置として利用されている。… ※「逆ピッチプロペラ」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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