April 26, 2013
Pratt & Whitney Rocketdyne Completes J-2X Hot Fire Testing The last in a series of hot-fire tests on a J-2X engine with a stub-nozzle extension at simulated altitude conditions has been completed by Pratt &Whitney Rocketdyne. This latest chapter in the development of America's next rocket engine paves the way toward full-motion testing of the J-2X engine, which is designed to power humans to Mars. NASA has selected the J-2X as the upper-stage propulsion for the evolved 143-ton Space Launch System (SLS), an advanced heavy-lift launch vehicle.
Read entire article on Aero News