A, an unmanned scramjet testbed, set the world record for an air-breathing aircraft by hitting Mach 9.6 in 2004. -Launched ...
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 ...
NASA's experimental X-43A didn't have a pilot and couldn't fly independently, but its blisteringly high speeds showed that hypersonic flight was possible.