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United Launch Alliance has placed an order with Aerojet Rocketdyne for 116 RL10C-X engines for the upper stage of the Vulcan Centaur rocket. This is Aerojet's largest ever contract for the RL10 engine.
“Aerojet Rocketdyne announced April 11 it has received an order from United Launch Alliance for 116 engines for the upper stage of ULA's Vulcan Centaur rocket.”spacenews.com
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