This Is NASA's Fastest Aircraft Ever

Only three of these aircraft were built, with one being destroyed and two operating successfully. The X-43 testbed aircraft ...
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The Mach 15 X-43D ‘Hypersonic Scramjet’ Has a Message for the U.S. Air Force

D. It Never Flew — and That Matters Now. -NASA’s X-43A proved that an air-breathing scramjet could fly at hypersonic speeds, ...
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NASA’s X-43A Scramjet Almost Hit Mach 10 But Got the Hypersonic ‘Axe’

Article Summary - NASA’s Mach 10 Dream: Can the X-43A’s Legacy Go Operational? -In 2004, NASA’s X-43A set the air-breathing speed record at Mach 9.6, validating scramjet combustion but only for 10 ...