The U.S. Air Force Research Laboratory achieved a significant propulsion milestone when a Draper rocket engine reached supersonic flight conditions during a controlled test. The trial, conducted at ...

A new type of rocket engine, one that could power a plane from Los Angeles to Tokyo in just two hours, has eluded scientists for decades. Houston’s Venus Aerospace says it recently solved the puzzle.

Ursa Major Technologies has completed the first hot-fire tests of its Hadley H13 liquid rocket engine, a milestone the company says could support reusable hypersonic test vehicles and smaller launch ...