United Launch Alliance's updated diagram of the Vulcan Centaur finally reflects what many saw as a foregone conclusion: the main stage will be powered by Blue Origin's BE-4 engine.
BE-4 hotfire
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Eileen Drake, president  and CEO of Aerojet Rocketdyne Holdings Inc, speaking at the 32nd Space Symposium in Colorado Springs, Colorado, in 2016. Credit: SpaceNews/Tom Kimmell
RS-25 test August 2018
Additive Rocket Corp. combines additive manufacturing with a tool called generative design, where computer algorithms develop thousands of different designs that meet a set of constraints and then iterate on them to find the optimal solution. Credit: ARC
AR-22 engine
AR-22 engine
A five-segment solid rocket motor similar to those Northrop Grumman Innovation Systems will supply NASA for its Space Launch System undergoes a 2011 test in Utah. Credit: NASA/Orbital ATK
RL10 hotfire test
Virgin Orbit 747
Space Tech Expo USA logo
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