Ever heard of perpetual motion or snake oil? That's what the title alludes to, and here's the summary from the page A new concept for in-space propulsion is pr

Ever heard of perpetual motion or snake oil? That's what the title alludes to, and here's the summary from the page A new concept for in-space propulsion is proposed in which propellant is not ejected from the engine, but instead is captured to create a nearly infinite specific impulse. Yeah, it doesn't look good at all. Maybe some solar freakin roadways: space edition. EDIT: the end of the slides is telling that this abortion hasn't been validated in the slightest: Basic concept is unproven •Has not been reviewed by subject matter experts •Math errors may exist!