NASA has selected for contract negotiations six proposals to reduce risk and cost on future advanced boosters for its Space Launch System (SLS) heavy-lift rocket. The proposals are for engineering demonstrations to support the transition of the SLS from its initial 70-metric-ton lift capacity, set to debut in 2017, to an eventual 130-metric-ton capability. Up to $200 million will be distributed among the teams chosen for formal contracts. Awards are expected in October, with funded ...


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