Discovering a machine that could somehow produce thrust without releasing propellant would be a game-changer for human space travel. There’s just one problem—such a device would defy the laws of physics.
This limitation has not stopped people from investigating the possibility, and the latest addition to the propellant-less club is an electrostatic design developed by a former NASA engineer.
While the company behind the drive, Exodus Propulsion Technologies, says that the drive can achieve a thrust to counteract Earth’s gravity, such a claim still needs independent verification and a healthy dose of skepticism.