Fuel-Less Space Drive May Actually Work, Says NASA | Popular Science: The design is seemingly based on the EmDrive, which was originally created by British scientist Roger Shawyer. The drive is supposed to convert electric power into thrust by bouncing microwaves off the walls of a closed container, and Fetta’s drive, while different, does relatively the same thing...
In a paper presented at the 50th Joint Propulsion Conference in Cleveland, Ohio, NASA apparently gave Fetta’s design their stamp of approval after testing his drive.�Granted, their tests only produced a small amount of thrust (between 30 and�50 micro-Newtons), but that’s still pretty impressive since absolutely no propellant was needed...
He notes that these experiments are pretty easy to mess up, since you basically have to recreate the vacuum of space for the results to be right. Any interference from an outside factor could affect the results...
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