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 ...

If you ask anyone working in the aviation industry what they think the most important component of modern-day planes is, chances are the vast majority may tell you that it is the jet engine. Also ...