interesting. in essence what we have here is a variation on the photon drive where instead of being bounced off an open reflector to generate momentum you have

interesting. in essence what we have here is a variation on the photon drive where instead of being bounced off an open reflector to generate momentum you have a closed cone. at first glance this would seem absurd since the forces acting on the two ends of the cone should cancel each other out. where it gets interesting is that this guy claims that the math shows that the photons are operating in a special frame of reference: essentially even though the photons are enclosed they behave as if they were not. thus momentum is imparted in one direction and all you have to do is keep pumping microwaves into the cone. being able to use electricity instead of some sort of stored propellant would be a huge step towards sustainable space flight. here's hoping it works. and even if it doesn't, science needs weirdos who are willing to work on edge cases. tesla's professor told him that the AC motor was a perpetual motion device and thus impossible.