NG Hypersonic XS-1 are to fly 10 times in 10 days and exceed Mach 10
Northrop Grumman has unveiled its vertical-launch, horizontal-landing reusable booster design for the Defense Advanced Research Project Agency’s (DARPA) XS-1 experimental spaceplane program. Northrop, teamed with subsidiary Scaled Composites and Virgin Galactic, is working under a 13-month,...