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autorotation

[ aw-toh-roh-tey-shuhn ]

noun

, Aeronautics.
  1. the condition of flight occurring when lift is derived solely from the action of air upon the unpowered rotor of a moving helicopter or autogiro.


autorotation

/ ˌɔːtəʊrəʊˈteɪʃən /

noun

  1. the continuous rotation of a body in an airflow, such as that of the rotor blades of a helicopter in an unpowered descent
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Other Words From

  • auto·ro·tation·al adjective
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Word History and Origins

Origin of autorotation1

First recorded in 1915–20; auto- 1 + rotation
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Example Sentences

The monocopter is thus equipped with a natural fail-safe, thanks to this ability to descend gracefully in autorotation in the event of a power failure.

He allowed his training to take over and skillfully put the machine into an autorotation to prevent a catastrophic nosedive into the mountain.

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autoromanticautoroute