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The Avro Avian was a series of British light aircraft designed and built by Avro in the 1920s and '30s. While the various versions of the Avian were sound aircraft, they were comprehensively outsold by the de Havilland Moth and its descendants. ==Design and development== The Avro 581 Avian prototype was designed and built to compete in the Lympne light aircraft trials at Lympne Aerodrome in September 1926. Its wooden fuselage was based on that of the Avro 576 autogyro, but it was fitted with conventional biplane wings and powered by a 70 hp (50 kW) Armstrong Siddeley Genet engine.〔 It performed well at the trials, but was eliminated due to engine failure. In early 1927 it was re-engined with an ADC Cirrus engine as the Type 581A and sold to Bert Hinkler. Production aircraft were designated Type 594 and were built in a number of versions, mainly powered by Cirrus engines.〔Jackson 1990, pp. 249, 256.〕 A version with a welded steel tube fuselage was produced in 1929 as the Avro 616 Avian IVM to meet overseas requirements for an easier-to-repair structure.〔Jackson 1990, p. 265.〕 This version was built in the largest numbers, with approximately 190 built.〔Donald 1997, pp. 78–79.〕 The Avian was also produced under licence in Canada, by Ottawa Car Manufacturing Company in Ottawa, Ontario.〔Payne, Stephen, ed. ''Canadian Wings'' (Douglas & McIntyre, Ltd., 2006), p.162 & p.163 caption.〕 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「Avro Avian」の詳細全文を読む スポンサード リンク
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