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An Aerojet Rocketdyne RS-25 rocket engine was tested on the A-1 Test Stand at the John C. Stennis Space Center in Mississippi, on 19 January 2022, at 19:59 UTC (13:59 CST, 14:59 EST). According to NASA, “For the Jan. 19 test, engineers fired the RS-25 developmental engine at power levels ranging from 80 percent to 111 percent for a full duration of about eight-and-a-half minutes (500 seconds), the same amount of time the engines must fire to help propel SLS to orbit. New hardware tested on the engine includes valves, insulation, rigid and flex ducts, a high pressure fuel turbopump, a high pressure oxidizer turbopump, instrumentation, and a POGO accumulator manufactured using selective laser melting.” NASA’s Space Launch System (SLS) will be powered by four RS-25 engines firing simultaneously. Credit: NASA #RS25
