Final RS-68A Engine for Delta IV Heavy Completes Hot-fire Acceptance Test

Aerojet Rocketdyne’s RS-68A rocket engine successfully completed its final acceptance test April 12, 2021, on the B-1 test stand at NASA’s Stennis Space Center in Mississippi. The RS-68A powers the United Launch Alliance Delta IV Heavy rocket to send critical spacecraft into orbit. (Credit: NASA Stennis)

STENNIS SPACE CENTER, Miss. (Aerojet Rocketdyne PR) — Today (April 12), 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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