The Electromagnetic Drive, called the EmDrive, is an electromagnetic thruster (rocket) concept designed by aerospace engineer Roger Shawyer in 2001. It’s a superfast engine that gives off no radiation and consumes no propellant, or fuel. Hypothetically, it could get us from Earth to the moon in four hours. How? It would allegedly use the hypothetical model of a radio frequency resonant cavity thruster — sort of like a microwave.