Gyroplane

Japanese: gyro plane(英語表記)gyroplane
Gyroplane

...An aircraft that obtains lift through freely rotating (i.e., not power-driven) rotors. It is sometimes called a gyroplane, but gyroplane is originally a trademark of autogyro. An autogyro has freely rotating rotors located at the top near the center of gravity of the aircraft. When the rotors are first turned slightly by hand, the rotors tilt slightly backward as the aircraft moves forward, allowing air to flow in from below, so the aircraft continues to rotate naturally (autorotation).

*Some of the terminology used to refer to "gyro plane" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…自由に回転する(言い換えれば動力駆動ではない)回転翼によって揚力を得る航空機。ジャイロプレーンgyro planeと呼ばれることもあるが,ジャイロプレーンは元来はオートジャイロの一商標名である。オートジャイロは,機体の重心付近の上部に自由に回転する回転翼をもち,この回転翼は,初めに手でちょっと回しておくと,機体の前進とともに回転面が若干後方に倒れて下方から空気が流入するので,自然に回転し続ける(オートローテーション)。…

※「gyro plane」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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