U.S. startup Astro Mechanica plans to take its hybrid-electric supersonic engine into high-altitude and high-speed ground testing this year as it moves toward flying the unique powerplant in 2027 in a ...

GE and Lockheed ground tested a new air-breathing hypersonic jet engine capable of powering missiles to speeds well in excess ...

To continue reading this content, please enable JavaScript in your browser settings and refresh this page. Preview this article 1 min This founder was flying planes ...

Bob Maddox’s stage name, Crazy Rocketman, is a misnomer. Maddox doesn’t build rockets. He builds pulse-jet engines. There’s a difference. As for the crazy part—that may be true. Maddox is the world’s ...