au·​to·​ro·​ta·​tion | \ ˌȯ-tō-rō-ˈtā-shən How to pronounce autorotation (audio) \

Definition of autorotation

: the turning of the rotor of an autogiro or a helicopter with the resulting lift caused solely by the aerodynamic forces induced by motion of the rotor along its flight path

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Other Words from autorotation

autorotate \ ˌȯ-​tō-​ˈrō-​ˌtāt How to pronounce autorotate (audio) \ intransitive verb

Examples of autorotation in a Sentence

Recent Examples on the Web The altitude record for a rotorcraft stands at just over 40,000 feet, and during that flight the engine flamed out and the pilot had to land using autorotation. Jay Bennett, Popular Mechanics, "How to Fly a Helicopter on Mars," 15 May 2018 According to People, an autorotation is when an aircraft flies purely through air moving up its rotors. Megan Friedman, Country Living, "An Official Report Details What Went Wrong in Troy Gentry's Fatal Helicopter Crash," 14 Sep. 2017 The company also should not have let an inexperienced instructor perform an autorotation on Kristian Blackwell's first night flight, the lawsuit said. Samantha Matsumoto,, "Wife of man killed in helicopter crash sues flight school," 25 May 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'autorotation.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of autorotation

1926, in the meaning defined above

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Time Traveler for autorotation

Time Traveler

The first known use of autorotation was in 1926

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Cite this Entry

“Autorotation.” Dictionary, Merriam-Webster, Accessed 10 Jul. 2020.

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