CommercialShuttle SSME returns as AR-22 for rapid reuse demonstration, fired ten times in ten days by Philip Sloss July 20, 2018 written by Philip Sloss Aerojet Rocketdyne successfully completed a nearly two-week long rapid-turnaround test-firing demonstration of a Space Shuttle Main Engine (SSME) on July 6 at the Stennis Space Center in Mississippi. Continue Reading July 20, 2018 13 FacebookTwitterPinterestEmail