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 ...

How to build a steel turbine using only a drill press and basic tools such as a hacksaw and files! This video will demonstrate how to make a reasonably well-balanced and functional turbine on a tight ...

Conceptually, radar is pretty simple: send out a radio wave and time how long it takes to get back via an echo. However, in practice, there are a number of trade-offs to consider. For example, ...