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.
- au·to·ro·ta·tion·al, adjective
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How to use autorotation in a sentence
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.Inspired by a seed, this rotating drone will make your head spin | Kelsey D. Atherton | November 18, 2021 | Popular-Science
He allowed his training to take over and skillfully put the machine into an autorotation to prevent a catastrophic nosedive into the mountain.
British Dictionary definitions for autorotation
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