autorotation


au·to·ro·ta·tion

noun \-rō-ˈtā-shən\

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
au·to·ro·tate \-ˈrō-ˌtāt\ intransitive verb

First Known Use of AUTOROTATION

1926

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