An engineering board has cleared the first element of NASA’s heavy-lift Space Launch System (SLS) for preliminary manufacturing, keeping the big new government-owned rocket on track for a first flight with the Orion multipurpose crew vehicle in 2017. In a preliminary design review Dec. 20 at Marshall Space Flight Center, which manages SLS development, the review board of experts in propulsion and vehicle design from industry and NASA determined the SLS core stage design met requirements ...


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