Maddox doesn’t build rockets. He builds pulse-jet engines. There’s a difference. As for the crazy part—that may be true.

In this video, we're getting hands-on in the garage to start a pulse jet engine. Watch the behind-the-scenes fun, challenges, and the tech wizardry that goes into creating these machines!

Since the 1960s engineers around the world have been fiddling with a novel type of jet called a rotating detonation engine (RDE), but ... such as ramjets and pulse jets, also work without ...