World's most powerful hydrogen-fueled rocket engine completes final acceptance test for ula delta iv heavy launch vehicle

Stennis space center, miss., april 12, 2021 (globe newswire) -- today, the world's most powerful hydrogen-fueled rocket engine built by aerojet rocketdyne, the rs-68a, completed its final hot-fire acceptance test for use on the united launch alliance (ula) delta iv heavy launch vehicle on the b-1 test stand at nasa's stennis space center in mississippi.
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