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DARPA plans sattelite launching XS-1 space plane

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DARPA, the Defense Advanced Research Projects Agency, announced on September 17, 2013 that it is embarking on the development of a new launch vehicle called the XS-1 that will be, in effect, a small space plane designed to launch satellites cheaply and reliably.

“DARPA has established the Experimental Spaceplane (XS-1) program. The program aims to develop a fully reusable unmanned vehicle that would provide aircraft-like access to space. The vehicle is envisioned to operate from a ‘clean pad’ with a small ground crew and no need for expensive specialized infrastructure. This setup would enable routine daily operations and flights from a wide range of locations. XS-1 seeks to deploy small satellites faster and more affordably, while demonstrating technology for next-generation space and hypersonic flight for both government and commercial users.”

The project will be headed by Jess Sponable, a former Air Force officer who is most famous for being the project manager of the DC-X, a vehicle flown in the early 1990s that tested technology on a vertical takeoff and vertical landing rocket. He has since been involved in a number of space plane projects.

XS-1 will provide capabilities that will be sorely needed as the United States military relies more and more on space assets. It will be able to quickly and reliably deploy satellites.

“XS-1 envisions that a reusable first stage would fly to hypersonic speeds at a suborbital altitude. At that point, one or more expendable upper stages would separate and deploy a satellite into Low Earth Orbit. The reusable hypersonic aircraft would then return to earth, land and be prepared for the next flight. Modular components, durable thermal protection systems and automatic launch, flight, and recovery systems should significantly reduce logistical needs, enabling rapid turnaround between flights.

“Key XS-1 technical goals include flying 10 times in 10 days, achieving speeds of Mach 10+ at least once and launching a representative payload to orbit. The program also seeks to reduce the cost of access to space for small (3,000- to 5,000-pound) payloads by at least a factor of 10, to less than $5 million per flight. “

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