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 ...

GE revealed this week that they have made significant progress on the ATP engine. The private turboprop plane, a Cessna Denali, would use 20% less fuel than comparable models, while providing 10% more ...