DARPA's Secretive "Phantom Express" Hypersonic Spaceplane Passes Key Test
Zero Hedge -

DARPA selected the Boeing Company in May 2017 to complete advanced design work for the Agency’s Experimental Spaceplane (XS-1) program, which intends to develop and fly the first of an entirely new class of hypersonic spacecraft that would bolster national security by providing short-notice, low-cost satellite launches into low Earth Orbit (LEO).

“The XS-1 would be neither a traditional airplane nor a conventional launch vehicle but rather a combination of the two, with the goal of lowering...

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