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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NASA Mega Moon Rocket Passes Key Test, Readies for Launch

The core stage for the first flight of NASA’s Space Launch System rocket is seen in the B-2 Test Stand during a second hot fire test, Thursday, March 18, 2021, at NASA’s Stennis Space Center near Bay St. Louis, Mississippi. The four RS-25 engines fired for the full-duration of 8 minutes during the test and generated 1.6 million pounds of thrust. The hot fire test is the final stage of the Green Run test series, a comprehensive assessment of the Space Launch System’s core stage prior to launching the Artemis I mission to the Moon. (Credits: NASA/Robert Markowitz)

BAY ST. LOUIS, Miss. (NASA PR) — The largest rocket element NASA has ever built, the core stage of NASA’s Space Launch System (SLS) rocket, fired its four RS-25 engines for 8 minutes and 19 seconds Thursday at NASA’s Stennis Space Center near Bay St. Louis, Mississippi. The successful test, known as a hot fire, is a critical milestone ahead of the agency’s Artemis I mission, which will send an uncrewed Orion spacecraft on a test flight around the Moon and back to Earth, paving the way for future Artemis missions with astronauts.

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