COLORADO SPRINGS — Aerojet Rocketdyne has studied what it would take to replace the Russian-built RD-180 and AJ-26 rocket engines used in the Atlas V and Antares launch vehicles. The answer is at least four years, with enough money, said Julie Van Kleeck, Aerojet Rocketdyne vice president for Advanced Space & Launch Systems, when asked what it would take to develop new engines domestically if Russia shuts off the supply over the Crimean crisis. “We believe that it can be ...


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