Manufactured past times North American Aviation Inc., the X-15 experimental aircraft was launched from nether the fly of a particularly converted bomber as well as became a record-breaking flight machine. On Nov 9, 1961, exam airplane pilot Robert M. White achieved the survive on speed of 4,520 miles per hr (7,274 km/h), or Mach 6.72, a tape that all the same stands to this day. In August 1963, exam airplane pilot Joseph A. Walker took the X-51 to an height of 107.8 km, automatically earning him his astronaut's wings.
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