Press Release

United Launch Alliance Selects Aerojet Rocketdyne’s RL10 Engine for Next-generation Vulcan Centaur Upper Stage

By SpaceRef Editor
May 11, 2018
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United Launch Alliance (ULA) today announced Aerojet Rocketdyne as a strategic partner for the RL10 upper stage engine for ULA’s next-generation Vulcan Centaur rocket following a competitive procurement process.
“ULA and Aerojet Rocketdyne have a long and successful history together that began with the first flight of our Atlas and Delta rockets in the 1960s,” said Tory Bruno, ULA president and CEO. “We could not be more pleased to have selected the proven and reliable RL10 to power our Vulcan Centaur upper stage.”
This partnership is a long-term agreement for Aerojet Rocketdyne to provide upper stage propulsion for the next decade. As part of this partnership, Aerojet Rocketdyne will provide RL10s and develop the RL10C-X, the next generation of the RL10 family. The RL10C-X will increase the use of additive manufacturing and introduce other advanced technologies to improve the quality, reliability, affordability and performance.
“Key determining factors to our selection included price and delivery schedule,” said Bruno. “We look forward to continuing our strong partnership to ensure a successful introduction of Vulcan Centaur.”
Over the course of nearly 60 years, more than 450 RL10 engines have flown on various ULA heritage vehicles with an unmatched record of mission success.
ULA continues its competitive procurement process for the booster engine and plans to make a down select soon.
With more than a century of combined heritage, United Launch Alliance is the nation’s most experienced and reliable launch service provider. ULA has successfully delivered more than 125 satellites to orbit that provide critical capabilities for troops in the field, aid meteorologists in tracking severe weather, enable personal device-based GPS navigation and unlock the mysteries of our solar system.
For more information on ULA, visit the ULA website at, or call the ULA Launch Hotline at 1-877-ULA-4321 (852-4321). Join the conversation at, and

SpaceRef staff editor.