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The Sunbeam Nubian, also called the Sunbeam 155 hp, was a British 8-cylinder aero-engine that was first run in 1916.〔 ==Design and development== In March 1916 Louis Coatalen, the chief designer at Sunbeam, responded to the Admiralty's request for more powerful engines by designing the V-8 Nubian. The Nubian featured the twin overhead camshafts and four valves of his pre-war engines for Grand Prix and TT racing cars. With a bore of and stroke of the Nubian displaced and was rated at with a reduction gear ratio of 0.615:1.〔 The original engine was built with 60 degree angle between cylinder banks but severe vibration problems forced Coatalen to redesign it with a 90 degree angle, emerging as the Nubian II. Intended to power the Supermarine AD Flying Boat the teething troubles of the Nubian forced Supermarine to use a Hispano-Suiza V-8 engine instead.〔 Deliveries of the Nubian II began in October 1917, by which time the Nubian was overshadowed by the more powerful V-8s from Hispano-Suiza and the Sunbeam Arab. The only aircraft known to have been powered by a Nubian was the Saunders T.1, but some of the 36 engines built, of 50 ordered, are believed to have been supplied to the Imperial Russian Air Service.〔 The Nubian suffered from a poor design decision at first and was overtaken by events which prevented widespread use, but its cousin, the V-12 Sunbeam Afridi and its family members found greater success.〔 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「Sunbeam Nubian」の詳細全文を読む スポンサード リンク
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