Virgin Galactic plans long-duration hot-fire ground tests of its 47,500-lb.-thrust NewtonTwo kerosene-fueled rocket engine “in the coming months,” following a full-mission duty cycle test of this 3,500-lb.-thrust NewtonOne engine. The work at Virgin's static test stand at Mojave, Calif., supports company plans to supplement its suborbital human spaceflight business by launching small satellites from its WhiteKnightTwo carrier aircraft. Developed and built by Virgin Galactic ...


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