Virgin Galactic is gearing up to run full-duration hot-fire tests of its first-stage, liquid-fueled Newton engine for the company’s LauncherOne rocket vehicle.   The two-stage LauncherOne is designed to place payloads up to 500 lb. into low Earth orbit and will be air-dropped from the WhiteKnightTwo (WK2) carrier aircraft developed initially to carry the SpaceShipTwo (SS2) sub-orbital space vehicle to launch altitude. Virgin says both first and second stages will be ...


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