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前苏联米高扬设计局研制的米格-31“捕狐犬”(Foxhound)双发双座全天候截击机是一种优秀的超声速截击机,也是前苏联第一种真正有下视下射(指飞机在地面杂波干扰下能发现并击毁低空目标)能力的作战飞机。出于当时对抗北约的需要,在基本型的基础上,前苏联军方要求米高扬设计局对其进行大幅改良,要求其对多目标攻击能力、目标搜索能力、长时间巡航能力以及载弹量都较基本型要有很大提高。改进后的米格31不仅能完成拦截空战任务,也可执行对地攻击、侦察及电子战等众多种作战任务,甚至还可充作小型预警机指挥米格23/29、苏-15/27等战机进行作战,真正实现一机多能。但冷战结束后,由于政治与经济的原因,该计划完全被冻结。20世纪90年代中期以后,俄罗斯出于军费不足的考虑,又重新开始审视米格-31,并重提改进方案,希望改进后的米格-31能继续服役,直到俄第五代战机出现。
The MiG-31 “Foxhound ” two-seater all-weather interceptor that was developed by the Mikoyan Design Bureau of the former Soviet Union is an excellent supersonic speed interceptor that is also the first real Soviet submarine launch (That aircraft can detect and destroy low-altitude targets under ground clutter interference) capability of the combat aircraft. For the time being against NATO, on the basis of the basic type, the former Soviet Union military asked Mikoyan Design Bureau to significantly improve it, demanding its multi-target attack capability, target search capability, long cruise capability, and payload Compared with the basic type have greatly improved. The improved MiG-31 not only fulfills the task of intercepting air combat, but also performs a wide range of combat missions such as ground attack, reconnaissance and electronic warfare, and may even serve as a command point for small AWACS MiG 23/29 and Su-15/27 Fighter combat, truly multi-functional machine. However, after the end of the Cold War, due to political and economic reasons, the plan was completely frozen. After the mid-1990s, Russia began to review the MiG-31 again for military consideration and reiterated its plan for improvement. It hopes the improved MiG-31 will continue its service until the fifth generation of Russian fighters appears.