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| J-2X marks a first at SSC. NASA/SSC photo |
STENNIS SPACE CENTER, Miss. -- A J-2X engine that will eventually be used in the NASA Space Launch System had a 40-second test on the A-2 Test Stand Friday. For the first time, test conductors fired the J-2X in both the secondary and primary modes of operation, 20 seconds in each. Previous tests were run in one mode only; combining the two allowed operators to collect critical data on engine performance. Pratt & Whitney Rocketdyne is developing the J-2X engine for NASA's Marshall Space Flight Center in Huntsville, Ala. (Source:
NASA/SSC, 05/25/12)
