单词	autorotation
释义	autorotation /ˌɔːtə(ʊ)rə(ʊ)ˈteɪʃ(ə)n / noun [mass noun] 1Rotation of an object caused by the flow of moving air or water around the shape of the object (e.g. a winged seed). 1.1Autorotation in the rotor blades of a helicopter that is descending without engine power.I entered autorotation, jettisoned the external load and landed the aircraft.... Unless the crew had the presence of mind to close both throttles at the instant of autorotation, an asymmetric thrust condition would have made an inverted spin even more unstable. The two were reportedly practicing high-altitude autorotations at 6,000 ft near the northern Italian air force base at Rimini. Derivatives autorotate verb ... Diaspores are 22-mg and 22 mm long samara-like winged seeds that autorotate while falling at an average terminal velocity of 0.81 [+ or -] 0.01 m/s, mean [+ or -] 1 SE. During a previous flight, the pilot successfully autorotated to a field when the dual magneto failed. Subsequent to the ‘flameout,’ the aircraft was autorotated and a safe landing was made.
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