Definition of autorotation in English:



  • 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. 1.1Autorotation 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.’
      • ‘I feel that there are several factors that could have contributed to the initial autorotation.’
      • ‘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 then checked our operational weight and confirmed we were safe for the practice autorotations.’
      • ‘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.’



/ˌôdōˌrōˈtāSH(ə)n/ /ˌɔdoʊˌroʊˈteɪʃ(ə)n/