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__NOTOC__ The Arpin A-1 was a two seat low-wing monoplane which was powered by a single radial engine in pusher configuration, mounted behind the cabin between twin booms that carried the tail. An unconventional fixed tricycle undercarriage was fitted. Only one was built. ==Development== The Arpin A-1〔("Combined Virtues" ) ''Flight'' 12 May 1938 p.479〕 was a low-wing monoplane of wooden construction and plywood covered. The empennage was carried on a pair of diamond cross section booms mounted on the rear wing spar at the edge of the centre section. The fins were tall, with a slight extension below the boom and carrying unbalanced rudders. The booms were at wing height but the side by side two seat enclosed cabin sat on the wing with the uncowled 68 hp (51 kW) British Salmson AD.9R radial immediately behind, with its centre line well above the booms and tailplane. The pusher arrangement and a short nose provided good visibility from the cabin. The Arpin had a fixed tricycle undercarriage at a time when most aircraft used the tailwheel configuration. It was the first British aircraft to be designed for tricycle landing gear.〔("The Smaller Types" ) ''Flight'' 25 November 1937 p.515〕 In 1938 a very unusual McClaren type was fitted,〔 which allowed all three wheels to be turned parallel to each other but not to the aircraft, so that cross wind landings could be made with the aircraft pointing into wind. The front wheel could be left to caster or could be steered by the pilot. In 1939 the A-1 was re-engined with an inverted inline 90 hp (67 kW) Blackburn Cirrus Minor I, which raised the maximum speed to 115 mph (185 km/h).〔(''Flight'' 7 September 1939 p.218 )〕 With this engine it was known as the Arpin A-1 Mk.2 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Arpin A-1」の詳細全文を読む スポンサード リンク
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