schwit1 writes "Like something out of a Robert Heinlein novel, students at the University of California, San Diego (UCSD) have built a metal rocket engine using a technique previously confined to NASA. Earlier this month, the UCSD chapter of the Students for the Exploration and Development of Space (SEDS) at the Jacobs School of Engineering conducted a hot fire test for a 3D-printed metal rocket engine at the Friends of Amateur Rocketry launch site in California's Mojave Desert. This is the first such test of a printed liquid-fueled, metal rocket engine by any university in the world and the first designed and printed outside of NASA."
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