Engines to be tested this week

STENNIS SPACE CENTER, Miss. -- Two rocket engine tests are scheduled this week at Stennis Space Center. On Wednesday NASA will conduct another in a series of tests on the J-2X rocket engine being developed by Pratt and Whitney Rocketdyne for NASA's Space Launch System. The test is at the A-2 stand. NASA did a combustion stability test of the J-2X Dec. 1. On Thursday there will be a test of the Aeroject AJ26 rocket engine that will power Orbital Sciences Corp.’s commercial cargo flights to the International Space Station. (Source: NASA, 12/13/11)