Science & Tech
6
The SR-71 could cruise at speeds in excess of Mach 3, three times the speed of sound, at altitudes of 80,000 feet. On March 6, 1990, an SR-71 flew coast to coast in 68 minutes 17 seconds. Its length was 107 feet 5 inches, its wingspan was 55 feet 7 inches, and it had two Pratt & Whitney J-58 turbojet engines.
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