The Hafner Gyroplane, c1935 (c1937). The Hafner AR III Gyroplane, a British autogyro designed by Austrian Raoul Hafner (1905-1980), and built by the AR III Construction Company at Denham, Buckinghamshire in 1935. From Wonders of World Aviation, Vol. 1, by Clarence Winchester. [The Amalgamated Press Ltd, London, c1937]
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