SLS Hot Fire, final Green Run Test… to be continued

Space Coast, FL – Yesterday, NASA preformed a hot fire test for the new Space Launch System rocket. The hot fire test is the ignition of 4 RS-25 Aerojet Rocketdyne engines. The test was to also include the gimbal of all 4 engines. These legendary engines were the ones they used on the Space Shuttle.

Test Stand B-2 with SLS Corse stage at NASA Stennis Space Center
NASA Stennis Test Pad B with SLS core stage on top | photo: NASA

Green Run Test

Teams from NASA’s Space Launch System (SLS) Program conducted a hot fire of the Artemis I core stage on Jan. 16 at NASA’s Stennis Space Center. All four RS-25 engines ignited successfully, but the test was stopped early after about a minute. At this point, the test was fully automated.

Four RS-25 engines ignited
4 RS-25s light up NASA Stennis | image: NASA

Each RS-25 has previously flown on a Space Shuttle. These four proven engines contributed to 21 successful shuttle flights over three decades.

During the firing, the onboard software acted appropriately and initiated a safe shutdown of the engines. During the test, the propellant tanks were pressurized, and this data will be valuable as the team plans the path forward. In coming days, engineers will continue to analyze data and will inspect the core stage and its four RS-25 engines to determine the next steps.

Plume from NASA Stennis during hot fire test
NASA’s Space Launch System rocket in the B-2 Test Stand | photo: NASA/Robert Markowitz

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.

Watch the Hot Fire Test

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