Diesel aircraft engines promise lower fuel burn and cheaper operating costs at a time when every gallon and every kilogram matter in the air. Yet as manufacturers push these powerplants into more ...

Jet-engine noise shouldn’t be your new sleep soundtrack, yet residents near Elon Musk’s xAI facility in Southaven, Mississippi wake up every morning to industrial roar. Twenty-seven methane gas ...

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 ...