DC-X was McDonnell Douglas’s uncrewed, low-altitude reusable rocket demonstrator for vertical takeoff, powered vertical landing and simplified ground operations. Eight flights from 1993 through 1995 explored hover, manoeuvring, autonomous landing and rapid turnaround. Four hydrogen/oxygen RL10A-5 engines powered the vehicle. It was subsequently rebuilt as DC-XA for NASA with lighter cryogenic tanks and improved reaction control. These demonstrators tested reusable-launch operations; they did not reach orbit.
Future launches and major activity directly linked to this vehicle family.