NASA Tests Deep Space J-2X Rocket Engine 
NASA – NASA conducted a 40-second test of the J-2X rocket engine Sept. 28, the most recent in a series of tests of the next-generation engine selected as part of the Space Launch System architecture that will once again carry humans into deep space. It was a test at the 99 percent power level to gain a better understanding of start and shutdown systems as well as modifications that had been made from previous test firing results.
The test at NASA’s John C. Stennis Space Center in south Mississippi came just two weeks after the agency announced plans for the new SLS to be powered by core-stage RS-25 D/E and upper-stage J-2X engines. The liquid hydrogen/liquid oxygen J-2X is being developed for NASA’s Marshall Space Flight Center in Huntsville, Ala., by Pratt & Whitney Rocketdyne. Image credit: NASA/SSC
Successful J-2X Rocket Engine 500-Second Test
NASA conducted a successful 500-second test firing on the A-2 test stand at NASA’s Stennis Space Center. Image credit: NASA/SSC
Successful J-2X Rocket Engine 500-Second Test
NASA conducted a successful 500-second test firing of the J-2X rocket engine on Wednesday, Nov. 9, marking another important step in development of an upper stage for the heavy-lift Space Launch System (SLS). Image credit: NASA/SSC
First J-2X Stability Test
During the Dec. 1 80-second duration J-2X test firing, NASA began characterizing the rocket engine’s combustion stability to understand more about the engine’s performance and robustness. Image credit: NASA/Stennis
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