
1) Aircraft with a rotor 2) Autogyro 3) Certain aircraft 4) Cousin of a helicopter 5) Gyroplane 6) Kind of aircraft
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https://www.crosswordclues.com/clue/autogiro

1) Autogyro 2) Gyroplane
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https://www.crosswordclues.com/clue/autogiro

rotary-wing aircraft, superseded after World War II by the more efficient helicopter. It employed a propeller for forward motion and a freely ... [4 related articles]
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http://www.britannica.com/eb/a-z/a/128

An aeroplane that flies by virtue of the lift generated by freewheeling rotating wings set 'windmill'' fashion above the fuselage The forward motion of the autogiro provides the force to keep the rotors turning so unlike a helicopter the autogiro cannot hover
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http://www.encyclo.co.uk/local/22135

[
n] - an aircraft that is supported in flight by unpowered rotating horizontal wings (or blades)
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http://www.webdictionary.co.uk/definition.php?query=autogiro

autogyro, autogiro 1. An aircraft powered by a conventional propeller and supported in flight by a freewheeling, horizontal rotor that provides lift. 2. An aircraft with an unpowered, horizontally rotating propeller on a shaft above the fuselage that provides lift for the machine, with forward propulsion being provided by a conventional propeller:...
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http://www.wordinfo.info/words/index/info/view_unit/946/
autogyro noun an aircraft that is supported in flight by unpowered rotating horizontal wings (or blades); forward propulsion is provided by a conventional propeller
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https://www.encyclo.co.uk/local/20974

Heavier-than-air craft that supports itself in the air with a rotary wing, or rotor. The Spanish aviator Juan de la Cierva designed the first successful autogiro in 1923. The autogiro's rotor provides only lift and not propulsion; it has been superseded by the helicopter, in which the rotor provides both. The autogiro is propelled b...
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https://www.encyclo.co.uk/local/21221

an aircraft with an unpowered, horizontally rotating propeller on a shaft above the fuselage that provides lift for the machine, with forward propulsion being provided by a conventional propeller: superseded in most applications by the helicopter.
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https://www.infoplease.com/dictionary/autogiro
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