为什么SR-71退役？
A2A. The SR-71 "Blackbird"was retired from the US Air Force primarily due to the following reasons:Technological advancement of Unmanned Aerial Vehicle (UAV): The SR-71 served with the U.S. Air Force from 1964 onwards and was retired in 1998 (34 years). Its aerial reconnaissance and forward observation assignments were gradually taken over by unmanned drones such as Global Hawk to avoid the embarrassment of another Francis Gary Powers incident . Sending in a Global Hawk does not have this problem and it costs a fraction of the price of maintaining an SR-71.
Technological advancement in US Spy Satellites : Early spy satellites in the 1970s such as the Corona series did not have sharp enough resolution for intelligence purpose, but in the late 1990s, spy satellites equipped with panchromatic camera with a 3 metres (9.8 ft) resolution and a multispectral camera with a 15 metres (49 ft) resolution were introduced which eliminates the need for middle atmosphere aerial reconnaissance.
Prohibitive price to maintain: "Reagan Administration Air Force Secretary Edward C. Aldridge Jr. estimated that the money used to operate the SR-71 fleet could operate and maintain two tactical fighter wings." SR-71: Why Is the World's Fastest Plane in a Museum?
If the SR-71 were to be reactivated, it would have a very low survivability rate against the Russian S-300, Chinese HQ-9 SAMs or MiG-31 Interceptors.
侦查卫星和无人机技术的发展，不需要黑鸟做辅助侦查，中国和俄罗斯防空技术的发展，降低了他的生存能力。 不懂英文已经不能在这论坛混了:funk: 因为有SR72了，就这个道理，SR72 用导弹追不上，再高点的，有X37，直接就弄你卫星，那东西上面还可以载核弹，直接在你头上，随时可以下来， 说到底，产品再NB，没有市场还是不行的。所以，做人不能太NB，要顺应时代和环境！！PS:黑鸟太屌了！
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