autogiro

The Oxford Pocket Dictionary of Current English | 2009 | 372 words | Copyright

au·to·gi·ro / ˌôtōˈjīrō/ (also au·to·gy·ro) • n. (pl. -ros) a form of aircraft with freely rotating horizontal vanes and a propeller. It differs from a helicopter in that the vanes are not powered but rotate in the slipstream, propulsion being by a conventional mounted engine.

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"autogiro." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>.

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