National Security Journal on MSN

Mach 9.6 X-43A ‘Hypersonic Scramjet’ Has a Message for Any Military on Earth

A, an unmanned scramjet testbed, set the world record for an air-breathing aircraft by hitting Mach 9.6 in 2004. -Launched ...
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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 ...
The Aviationist on MSN

NASA’s X-59 QueSST Conducts Maiden Flight

After some scrubbed attempts, NASA’s X-59 QueSST flew for the first time from Air Force Plant 42 in Palmdale on Oct. 28, 2025 ...