Alt Propulsion's video: EmDrive Reactionless Drive - 2021 Update

https://www.americanantigravity.com - In this overview video, Roger Shawyer describes the fundamentals of operation for the EmDrive, at https://www.emdrive.com It appears to indicate that it has already been tested in space by Russia, China and the US. The EmDrive is radio frequency (RF) resonant cavity thruster is a device concept that is claimed to be a spacecraft thruster, and purported to generate thrust by reflecting microwaves internally in the device, in apparent violation of the law of conservation of momentum and other laws of physics. It is claimed to work by converting electricity into microwaves and channeling this electromagnetic radiation through a conical chamber. In theory, the microwaves can exert force against the walls of the chamber to produce enough thrust to propel a spacecraft once it’s in space.