Eric Walker added RF resonant cavity thruster - Wikipedia to EmDrive

Eric Walker added Gravity, Gizmos, and a Grand Theory of Interstellar Travel | WIRED to a number of topics

Eric Walker added Mach-effect gravitational assist (MEGA) drive, EmDrive and Alcubierre drive to Speculative physics, and added Speculative physics to Physics

Eric Walker added RF resonant cavity thruster - Wikipedia and Gravity, Gizmos, and a Grand Theory of Interstellar Travel | WIRED to EmDrive, and added EmDrive to Speculative physics