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Celebrating 60 Years – and Counting – of Flight for a Trusted National Workhorse
The Aerojet Rocketdyne RL10 engine with an unmatched record of reliability and high-performance is the premier upper-stage engine for the Nation. This engine powers the upper stages of United Launch Alliance’s Atlas V and Delta IV Heavy launch vehicles, as well as NASA’s Space Launch System Rocket. Two RL10 engines will power the upper stage of the first Vulcan flight slated to fly later this year.