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Northrop Delta
The Northrop Delta was an American single-engined passenger transport aircraft of the 1930s. Closely related to Northrop's Gamma mail plane, 13 were produced by the Northrop Corporation, followed by 19 aircraft built under license by Canadian Vickers Limited.
==Development and design==
When Jack Northrop set up the Northrop Corporation as a joint venture with the Douglas Aircraft Company in 1932, he set out to design two closely related single-engined aircraft as the new company's first products, a mailplane/record breaking aircraft, which was designated the Gamma and a passenger transport, the Delta.〔Francillon 1979, pp.23-24, 143.〕 The Delta was a low-winged monoplane, with a fixed tailwheel undercarriage. It was of all-metal stressed skin construction, with streamlining spats covering the main landing gear. While the Delta's wings were common with those of the Gamma, it had a new, wider fuselage, which seated the pilot in an enclosed cockpit immediately behind the engine, and had accommodation for eight passengers in a cabin behind the pilot.〔Green 1967, p.57.〕〔Francillon 1979, p.157.〕
The first Delta was flown in May 1933, and received an airworthiness certificate in August that year.〔
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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