J-2X returned to A-2

J-2X returned to A-2. NASA/SSC photo

STENNIS SPACE CENTER, Miss. -- J-2X engine 10001 was returned to the A-2 Test Stand Thursday at NASA's Stennis Space Center for its second round of tests. The developmental engine underwent an initial series of tests last year. Both the engine and test stand have been modified to begin simulated altitude testing in the coming months. The J-2X engine is designed and built by Pratt & Whitney Rocketdyne. The J-2X will provide upper-stage power for NASA's Space Launch System, a new heavy-lift vehicle capable of missions beyond low-Earth orbit. (Source: NASA/SSC, 03/08/12)