EmDrive, a Supposed Fuel-less Engine, Is Knocked Down Again
Image: Luis M. Molina/Gizmodo (Getty Images) Five years ago, NASA researchers experimented with an object called the EmDrive (or electromagnetic drive), a Y-shaped metal chamber in which, they reported, thrust could be produced without propellant. Such a contraption would refute core principles of physics as we know them and eliminate a huge barrier to deep space travel by nullifying the need to carry fuel. Ultimately, the hope riding on EmDrive was that propellant-less thrusters would make travel to distant objects, like the outer solar system and even nearby extrasolar systems like Alpha Ce...
Source: gizmodo.com