‘I don’t like my Honda Acty Attack’s performance. Can I get a 5,000-hp upgrade?’ said no Kei truck owner ever. Then Cody Detwiler bought one, and all the hot hinges of hell broke loose when he ...

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 ...

Screenshot from social media post of Ukrainian volunteers assembling a small cruise missile with a pulsating Trembita engine. Its task is to destroy objects and exhaust the enemy’s anti-aircraft ...