Definition of autorotation in English:

autorotation

noun ˌɔːtə(ʊ)rə(ʊ)ˈteɪʃ(ə)nˌôdōˌrōˈtāSH(ə)n

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.
  Example sentencesExamples
  I feel that there are several factors that could have contributed to the initial autorotation.
  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.
  The two were reportedly practicing high-altitude autorotations at 6,000 ft near the northern Italian air force base at Rimini.
  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.
  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.

Derivatives

autorotate

verb ˌɔːtəʊrəʊˈteɪtˌɔdoʊˈroʊˌteɪt

[no object]

1(of an object) rotate spontaneously as a result of a surrounding flow of moving air or water.
seeds with double-winged shapes managed to autorotate
1. 1.1 (of the rotor blades of a helicopter) rotate without engine power during a descent.
Example sentencesExamples
- Subsequent to the ‘flameout,’ the aircraft was autorotated and a safe landing was made.
- During a previous flight, the pilot successfully autorotated to a field when the dual magneto failed.
- 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.
- the rotors don't need to autorotate during an emergency landing

Definition of autorotation in US English:

autorotation

nounˌôdōˌrōˈtāSH(ə)n

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.
  Example sentencesExamples
  Later in the flight we were planning to perform practice autorotations and single-engine HODGE maneuvers, where the extra weight may have proven disastrous.
  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 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.
  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.
  I then checked our operational weight and confirmed we were safe for the practice autorotations.

单词	autorotation
释义	Definition of autorotation in English: autorotation noun ˌɔːtə(ʊ)rə(ʊ)ˈteɪʃ(ə)nˌôdōˌrōˈtāSH(ə)n 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 Autorotation in the rotor blades of a helicopter that is descending without engine power. Example sentencesExamples I feel that there are several factors that could have contributed to the initial autorotation. 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. The two were reportedly practicing high-altitude autorotations at 6,000 ft near the northern Italian air force base at Rimini. 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. 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. Derivatives autorotate verb ˌɔːtəʊrəʊˈteɪtˌɔdoʊˈroʊˌteɪt [no object] 1(of an object) rotate spontaneously as a result of a surrounding flow of moving air or water. seeds with double-winged shapes managed to autorotate 1.1 (of the rotor blades of a helicopter) rotate without engine power during a descent. Example sentencesExamples Subsequent to the ‘flameout,’ the aircraft was autorotated and a safe landing was made. During a previous flight, the pilot successfully autorotated to a field when the dual magneto failed. 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. the rotors don't need to autorotate during an emergency landing Definition of autorotation in US English: autorotation nounˌôdōˌrōˈtāSH(ə)n 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 Autorotation in the rotor blades of a helicopter that is descending without engine power. Example sentencesExamples Later in the flight we were planning to perform practice autorotations and single-engine HODGE maneuvers, where the extra weight may have proven disastrous. 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 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. 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. I then checked our operational weight and confirmed we were safe for the practice autorotations.
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