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 ...

Put simply, conventional supersonic engines are jet engines that are capable of reconfiguring themselves to operate at air speeds beyond Mach 1. That means shifting the flow of air and moving ...

The world’s heavy reliance on fossil fuels, especially for transportation, has left a deep mark on both the planet and public health. Burning these fuels releases a flood of greenhouse gases, which ...

Is it possible to build a world-class air force on engines that crack, stall, and occasionally threaten to self-destruct mid-flight? For decades, China’s answer seemed to be a reluctant yes until a ...