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苏—27是原苏联苏霍伊设计局研制的单座超音速全天侯空中优势战斗截击机。1969年,苏军为强化空军的战斗力,开始研制空中优势战斗机,原型机于1977年5月试飞。研制时间只有8年,可是设计定型却花了近10年。1986年设计定型后,就开始装备部队。现在俄罗斯空军决定选用并列双座的苏—27IB,取代苏—27,服役后将改称为苏—34。它将在气动布局和航空电子系统方面有进一步的改进。同
The Su-27 is a single-seat supersonic all-weather air superiority combat interceptor developed by the Soviet Union’s Sukhoi Design Bureau. In 1969, the Soviets began to develop air superiority fighters to strengthen the combat capabilities of the Air Force. The prototype was tested in May 1977. The development time was only 8 years, but it took nearly 10 years to design. After the design was finalized in 1986, it began to equip troops. Now the Russian Air Force has decided to use the two-seat Su-27 IB to replace Su-27 and will be called Su-34 after serving. It will have further improvements in aerodynamic layouts and avionics systems. with