The Merlin 1D engine, being tested at the SpaceX rocket development facility
SpaceX's Merlin 1D engine is now qualified for use on the Falcon 9 rocket
SpaceX’s Falcon 9 rocket is now a crucial step closer to getting more efficient new engines. While the launch vehicle currently uses nine of the company’s Merlin engines, the next-generation Merlin 1D achieved flight certification earlier this week.
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