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 ...

Reaching Alpha Centauri within a single human lifetime has long sounded like science fiction, yet a new generation of nuclear pulse concepts is forcing that timeline into serious discussion. The idea ...

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 ...