Northrop Grumman Developing XS-1 Experimental Spaceplane Design for DARPA
Northrop Grumman Corporation (NOC) with Scaled Composites and Virgin Galactic is developing a preliminary design and flight demonstration plan for the Defense Advanced Research Projects Agency’s (DARPA) Experimental Spaceplane XS-1 program. XS-1 has a reusable booster that when coupled with an expendable upper stage provides affordable, available and responsive space..
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