In mid-October the pine and oak trees surrounding NASA John C. Stennis Space Center’s Test Stand E1 will reverberate to a new sound as space launch company Stratolaunch fires up the first full-scale pre-burner of its future PGA rocket engine. Developed up until now in relative secrecy, the 200,000-lb.-thrust liquid-oxygen/hydrogen-fueled engine will be the world’s largest additively manufactured space propulsion system and forms a pivotal part of the company’s goal to make ...


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