Artist's depiction of a Hyper-X research vehicle under scramjet power in free-flight following separation from its booster rocket.
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Artist’s depiction of a Hyper-X research vehicle under scramjet power in free-flight following separation from its booster rocket. The X-43A was developed to flight test a dual-mode ramjet/scramjet propulsion system at speeds from Mach 7 up to Mach 10 (7 to 10 times the speed of sound, which varies with temperature and altitude).1997NASA Photo › X-43A Project Description