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The National Interest on MSNWhat It Took To Build The SR-71 BlackbirdThe legendary SR-71 Blackbird retains the record for America’s fastest manned aircraft—ever. W hile almost everyone has heard ...
The SR-71 could fly at Mach 3.2 (around 2,100 miles per hour). So, Blackbird was not hypersonic as its anticipated successor, the SR-72, is set to be. Instead, it was a supersonic plane.
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