The Air Force expects to start test-flying the Hypersonic Attack Cruise Missile starting this fall, according to a new report from the Government Accountability Office. Tests will iterate the design and continue until 2027, at which point HACM will transition to a major defense program ...
A recent test flight of the Lockheed Martin HAWC air-breathing hypersonic missile set a record for scramjet propulsion at hypersonic speeds, achieving about 327 seconds of combustion, versus 200 seconds in a 2010 test of the Boeing X-51 Waverider.