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Yakovlev Yak-17
The Yakovlev Yak-17 (Russian: Як-17 NATO reporting name "Feather",〔Parsch, Andreas and Aleksey V. Martynov. ("Designations of Soviet and Russian Military Aircraft and Missiles." ) ''Designation-Systems.net,'' 2008. Retrieved: 13 April 2010.〕 was an early Soviet jet fighter. It was developed from the Yak-15, the main difference being tricycle landing gear. The trainer version, known as the Yak-17UTI, was the Soviet's most numerous and important early jet trainer.
==Design and development==
Following testing of the Yak-15U, Yakolev ordered a major redesign, incorporating a nosewheel, while putting aside commonality with the Yak-3.〔Gunston, 1997〕 In addition, the main gear had to be redesigned to place the wheels behind the aircraft's center of gravity. The main gear were moved behind the front spar, and when retracted they filled most of the space between the spars. This caused a major redesign of the fuel tanks and reduced their capacity to just 680 liters (150 gallons). This necessitated the addition of two 200 liter (44 gallon) jettisonable tanks, which hung under the tip of each wing. The addition of the tip tanks required a redesign of the structure of the wing so that the aircraft could still maintain a load bearing of 12g. The vertical stabilizer was enlarged and a periscope was also added above the windscreen on most series aircraft. Armament, systems, and equipment were virtually unchanged.〔
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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