A radio frequency (RF) resonant cavity thruster is a device concept that is claimed to be a spacecraft thruster. It is purported to generate thrust by reflecting microwaves internally in the device...

The EmDrive. A New Concept in Spacecraft Propulsion. Satellite Propulsion Research Ltd (SPR Ltd) a small UK based company, has demonstrated a remarkable new space propulsion technology.

The EmDrive (also known as an RF resonant cavity thruster) is a purported reactionless propulsion technology, which would if true would revolutionize space travel and the world economy.

The EmDrive is a reactionless spacecraft drive proposed by Roger Shawyer in 1999. The key thing about it is that if it works, several extremely well-understood and tested principles of physics go completely out the window.

An EmDrive paper has finally been accepted by peer review. Originally, this article pointed out that previous studies and papers on the EmDrive have either not been submitted, or passed peer review.