The Lockheed SR-71 "Blackbird" was an advanced, long range, Mach 3+ strategic reconnaissance aircraft. It was developed from the Lockheed A-12 reconnaissance aircraft in the 1960s by the Lockheed Skunk Works as a black project. Clarence "Kelly" Johnson was responsible for many of the design's innovative concepts. During reconnaissance missions the SR-71 operated at high speeds and altitudes to allow it to outrace threats; if a surface-to-air missile launch was detected, standard evasive action was simply to accelerate.
http://hotfile.com/dl/77557034/fc9965c/SR-71.Blackbird.Design.Concept.part1.rar.html
http://hotfile.com/dl/77557107/ea4b6f0/SR-71.Blackbird.Design.Concept.part2.rar.html
http://www.filesonic.com/file/26560059/SR-71.Blackbird.Design.Concept.part1.rar
http://www.filesonic.com/file/26560015/SR-71.Blackbird.Design.Concept.part2.rar
http://www.fileserve.com/file/ZgT7m68/SR-71.Blackbird.Design.Concept.part1.rar
http://www.fileserve.com/file/qwdcEWH/SR-71.Blackbird.Design.Concept.part2.rar
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