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Hafner A.R.III Gyroplane
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The Hafner A.R.III Gyroplane was a British 1930s experimental autogyro designed by Austrian Raoul Hafner, and built by the A.R.III Construction Company at Denham, Buckinghamshire.〔〔
==Design and development==
The single-seat Gyroplane had a three-blade auto-rotating rotor fitted above the fuselage on a strutted plyon.〔 A Pobjoy Niagara radial piston engine was mounted on the fuselage nose.〔 It had fixed tailwheel landing gear and the rear fuselage included a large dorsal fin to provide directional stability.〔 An unusual feature was the control system which was equipped with spider-actuated cyclic and collective pitch control of the rotor blades; this mechanism, a variant of the swashplate-actuated rotor control, became a standard feature on helicopters.〔 In 1935, the Gyroplane was manufactured at the Martin-Baker Aircraft Company's factory at Denham, Buckinghamshire.〔 In autumn 1935, the Gyroplane, registered ''G-ADMV'', first flew at Heston Aerodrome, piloted by V.H. Baker.〔Flight, 19 September 1935, p. 318〕 On 6 February 1937, it flew at Hanworth Air Park, having been modified as the Mark 2 version. It was tested at Farnborough, and leased to the Royal Aircraft Establishment for research, but it was scrapped during the second world war.〔 A two-seat A.R.IV and three-seat A.R.V were planned, but construction was stopped when Hafner was interned under Defence Regulation 18B.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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