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An historic HFL Kholod Mach 6.47 scramjet jointly developed by NASA and CIAM -- the fastest rocket ever built -- is going under the hammer in September.
The accomplishment marks the longest flight for the $300 million X-51A technology demonstration program and, according to the Air Force and Boeing, the longest scramjet-powered hypersonic flight ever.
Trouble with a control fin on the sleek, scramjet-powered aircraft puts an abrupt and early end to the Air Force's attempt at a Mach 6 flight.
The Air Force's experimental, scramjet-powered Waverider makes a short but historic flight in a test range over the Pacific Ocean.
Vulcan combines turbine and scramjet engines to power hypersonic vehicle.
A peek at the rocket plane that broke the airspeed record.
Monday's flight of the X-43A is to test a type of supersonic engine that uses forward motion for power.
NASA successfully tests Mach 10 rocket-powered "scramjet" after a day's delay. Photos: NASA's X-43A "scramjet"
Space agency wants to see if pilotless aircraft has right stuff to travel at 10 times the speed of sound. Photo: NASA's X-43A scramjet