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Yakovlev Yak-5
The Yakovlev Yak-5 was an experimental trainer aircraft designed by Yakovlev OKB in the Soviet Union, and first flown in 1944. It was the first Yakovlev aircraft to be fitted with a variable-pitch propeller. It did not enter production.〔Gunston, 1997〕
==Development and design==
In 1944, the Yakovlev UT-2 was the standard primary trainer of the Soviet Air Forces, but its simplicity caused problems when pilots moved on to more sophisticated aircraft, so the Yakovlev design bureau designed a more sophisticated derivative, the UT-2L, which featured an enclosed tandem cockpit, the addition of flaps and blind flying instruments.〔Gunston 1995, p. 459.〕〔Gordon, Komissarov and Komissarov 2005, pp. 56–57.〕
At the same time, Yakovlev designed a single-seat aircraft based on the UT-2L, intended as a fighter-trainer. This aircraft, the Yak-5, was a low-wing monoplane of wooden construction, but unlike the UT-2, had the front cockpit removed and an enclosed sliding canopy placed over the rear cockpit. A retractable tailwheel undercarriage replaced the fixed landing gear of the UT-2. It was powered by a Shvetsov M-11D five-cylinder radial producing 115 hp (86 kW), which drove a two-bladed variable-pitch propeller. It could be fitted with a single synchronized ShKAS machine gun aimed by a reflector sight, while the aircraft was also fitted with a radio.〔Gunston and Gordon 1997, p. 91.〕〔Gordon, Komissarov and Komissarov 2005, p. 57.〕
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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