X-3 Stiletto’s Best Day

July 28, 1953
At Edwards Air Force Base, Calif., company pilot William Bridgeman pilots the Douglas X-3 Stiletto to the highest speed this grossly underpowered research aircraft will reach, Mach 1.21—and this only comes after he put the aircraft in a shallow dive. The X-3 was designed to fly at sustained speeds above Mach 2 for longer than 30 minutes at high altitudes.

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