Definition of autorotation in English:

autorotation

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. 1.1 Autorotation in the rotor blades of a helicopter that is descending without engine power.
      • ‘I entered autorotation, jettisoned the external load and landed the aircraft.’
      • ‘Later in the flight we were planning to perform practice autorotations and single-engine HODGE maneuvers, where the extra weight may have proven disastrous.’
      • ‘I feel that there are several factors that could have contributed to the initial autorotation.’
      • ‘The two were reportedly practicing high-altitude autorotations at 6,000 ft near the northern Italian air force base at Rimini.’
      • ‘The bottom line is I made a series of poor choices and overestimated my ability to recognize, react, and recover from a poor autorotation flown by my copilot.’
      • ‘I then checked our operational weight and confirmed we were safe for the practice autorotations.’
      • ‘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.’

Pronunciation

autorotation

/ˌɔːtə(ʊ)rə(ʊ)ˈteɪʃ(ə)n/