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 ...

The best fighter jets in the world cost a fortune. One of the reasons for this is because of the unbelievably high prices of the engines that power these air fighters. The engine has to be ...