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Yakovlev Yak-50 (1949)
Yakovlev Yak-50 was an early experimental turbojet interceptor aircraft designed in 1948 by the Yakovlev OKB in USSR. The aircraft was essentially a stretched version of the Yakovlev Yak-30 (1948), with a more powerful engine and greater sweep to the wings. The Yak-50 is perhaps most significant as the first Yakovlev aircraft equipped with the ''velosipednoye'' (bicycle) landing gear, a trademark of later Yakovlev designs. The Yak-50 designation was later reused for a propeller-driven aerobatic and trainer aircraft.〔Gunston, 1997〕
==Development and design==
On February 21, 1949 a Sovmin order requested the Yakovlev OKB to design a lightweight, radar-equipped, all-weather and night interceptor capable of Mach 0.97 at 4,000 m (13,000 ft). The aircraft was to utilize the Klimov VK-1 engine which first appeared on Mikoyan-Gurevich MiG-15 and MiG-17 fighters. This engine was itself a Soviet copy of the British Rolls-Royce Nene centrifugal turbojet initially known as the RD-45. The leading fighter OKBs each created a prototype to meet the requirement, which included the Lavochkin La-200, Mig I-320, Suchoi Su-15 (unrelated to the later aircraft with the same designation) and the Yak-50 (again, unrelated to the later aircraft). A major difference was that while Yakolev used one engine, the other design bureaus used two.〔Gunston, 1997〕
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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