Sierra Nevada Corp. is moving into fabrication of the aeroshell structures for its planned Dream Chaser lifting-body crew vehicle, after winning NASA approval for the tooling needed to build the hardware. Under the company’s $20-million Commercial Crew Development (CCDev) agreement, the space agency also certified it had cleared a milestone with a three-ignition hot-fire test of the hybrid rocket engine that will power the Dream Chaser. “It was a pretty hard test,” said Mark N. Sirangelo, ...


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