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ULA selects RL10 for Vulcan upper stage
Posted: Sat, May 12, 2018, 6:11 PM ET (2211 GMT)
Vulcan launch vehicle illustration (ULA) United Launch Alliance announced Friday that it will use the RL10 engine from Aerojet Rocketdyne for its Vulcan upper stage. ULA said it selected the RL10 in a "competitive procurement" that likely also included Blue Origin's BE-3U. The decade-long deal also includes an agreement to cooperate on the development of a next-generation version of the engine, known as the RL10C-X. ULA has yet to make a decision on which engine will power the first stage of Vulcan, weighing Aerojet's AR1 versus Blue Origin's BE-4, but said a decision would come "soon."
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