Posted: Tue, Aug 18, 2015, 11:29 PM ET (0329 GMT)
NASA successfully tested an RS-25 engine last week as part of its development of the Space Launch System. The engine test, at the Stennis Space Center in Mississippi, fired the engine for eight minutes and 55 seconds, the length of a full-duration burn on a typical SLS mission. The RS-25 engine is a version of the Space Shuttle Main Engine; the engine tested at Stennis is a leftover SSME with some upgrades. The test was the next-to-last in a series of static fires of this developmental engine, with tests of flight engines scheduled to begin in the fall.
