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 hopping on a motorcycle isn’t thrilling or deadly enough for you anymore, you may want to point your browser toward eBay Motors. The world’s first and only twin-pulse-jet-engine motorcycle is ...