A jet engine with no moving parts. Sounds like something out of Dune. But a Baltimore start-up successfully flight-tested a scaled version to prove that the concept worked. Wave Engine Corp. released ...

What is the difference between military and commercial engines? The answer is either a lot or not much at all, as it depends on what military aircraft you are talking about. Fighter jet engines are ...

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 ...