DARPA’s proposed budget for FY 2015 calls for a significant increase in its Experimental Spaceplane One (XS-1) program and smaller boosts in the Airborne Launch Assist Space Access (ALASA) program and Project Phoenix, budget documents show.
The defense agency has requested $27 million for re-useable XS-1 space plane this year, a significant boost over the $10 million being spent for FY 2014. With the increase in funding, DARPA plans to conduct a preliminary design review (PDR) and select a single vendor for final design, fabrication and flight test in the coming fiscal year, which will start on Oct. 1.
The XS-1 program is designed to launch payloads weighing 3,000-5,000 lbs (1,361-2,268 kg) to low earth orbit at a cost at least 10 times less expensive to current launch vehicles. DARPA accepted proposals from potential vendors earlier this year and is currently evaluating them.
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