Bob Maddox’s stage name, Crazy Rocketman, is a misnomer. Maddox doesn’t build rockets. He builds pulse-jet engines. There’s a ...

Wave Engine Corp has aced a demonstration flight of a simple jet engine with no moving parts. A modern version of a pulsejet, the J-1 engine powered a UAV through take-off and several mid-air ...

This whole thing is already pretty ridiculous, but some have become even wackier over the years as owners have transplanted other engines into them. We've seen one that had a 650 cc parallel-twin out ...