Boeing’s Phantom Express Vanishes into Thin Air

DARPA’s Experimental Spaceplane (XS-1) program seeks to build and fly the first of an entirely new class of hypersonic aircraft that would break the cycle of escalating launch costs and make possible a host of critical national security options. As the next step toward a future of routine, responsive, and low-cost space access, DARPA has awarded Phases 2 and 3 of the program to The Boeing Company. (Credit: Boeing)

by Douglas Messier
Managing Editor

A couple of years ago, a friend made the surprising predication that DARPA’s Experimental Spaceplane Program (XSP) — a R&D effort designed to produce a rocket capable of being launched 10 times in 10 days — would never see any hardware built.

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