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Mikoyan-Gurevich I-3
The Mikoyan-Gurevich I-3 was the first of three closely related fighter prototype programs developed by the Mikoyan-Gurevich design bureau in the Soviet Union in the mid/late 1950s - starting with the I-3, continuing with the I-7 and finally evolving into the I-75. On several occasions airframes were re-built and/or re-used both within a program or in a succeeding program. All the aircraft in the I-3 program were affected by delays in the development of the Klimov VK-3 turbojet engine, its cancellation and replacement by the Lyulka AL-7F turbojet engine.
== Design and development ==
Both the I-3 and I-3P were ordered by the Council of Ministers on June 3, 1953 – the I-3 as a front-line fighter and the I-3P as an all-weather interceptor. They were developed in parallel with the I-1/2 program but with nothing in common except for a similar wing.〔 On the other hand, the I-3’s visual appearance was so similar to the Sukhoi S-1 (the Su-7 prototype) that a common design specification and fundamental research source seems likely.〔 Compared to the Mikoyan-Gurevich MiG-19 the I-3U was slightly larger and heavier, but aerodynamically very similar.〔
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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