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Austin Osprey
The Austin A.F.T.3 Osprey was a prototype British fighter triplane of the First World War. Developed by the motor car manufacturer Austin as a replacement to the Sopwith Camel, only one was built, the Sopwith Snipe being preferred.
==Development and design==
In 1917, Britain's War Office issued Specification A.1.A for a single-seat fighter to replace the Sopwith Camel. To meet this requirement, the Austin Motor Company, already a large scale manufacturer of aircraft to Royal Aircraft Factory designs, produced its own design for a single-engined triplane, the A.F.T.3 Osprey, receiving a licence to build three prototypes as a private venture.〔Mason 1992, p.128.〕
The Osprey was of conventional wood and fabric construction, with single-bay triplane wings. It was powered by a Bentley BR2 rotary engine, and featured the required armament of two Vickers machine guns and a single Lewis gun. The synchronised Vickers guns were mounted ahead of the pilot, while the Lewis gun was mounted on a movable mounting on the centre section of the middle wing, where it had a very limited field of fire, with the large diameter propeller blocking any forward fire.〔Bruce 1965, p.27.〕 Like a similar gun mounted on the Snipe it would probably have been deleted had the type gone into production.
The first Osprey flew in February 1918,〔Bruce 1965, p.28.〕 being tested at Martlesham Heath in March.〔〔 It was heavier than expected, and its performance was inferior to Sopwith's Snipe. When the Snipe was selected as the winner of the competition for the new fighter, Austin abandoned development of the Osprey, with the second and third prototypes not completed.〔〔Mason 1992, p.273.〕 The first prototype was briefly used for trials at the Royal Aircraft Establishment, Farnborough until at least June 1918.〔Bruce 1965, p.29.〕
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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