WASHINGTON — Rocket propulsion startup Ursa Major Technologies has secured a $28.5 million contract from the U.S. Air Force Research Laboratory to conduct the first flight test of its Draper engine, a storable, high-performance propulsion system tailored for hypersonic missile applications.

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Sandra Erwin writes about military space programs, policy, technology and the industry that supports this sector. She has covered the military, the Pentagon, Congress and the defense industry for nearly two decades as editor of NDIA’s National Defense...