Caption:infobox controversial invention

{{Infobox controversial invention | name = RF resonant cavity thruster | image = File:EmDrive built by Eagleworks inside the test chamber.jpg | alt = | caption = Prototype resonant cavity thruster built by [[NASA]]'s [[Eagleworks Laboratories]] | topics = {{plainlist | *[[Physics]] *[[Electromagnetism]] *[[General relativity]] *[[Engineering]] }} | claims = Device produces thrust without a reaction force. | origyear = 2001 | inventor = {{plainlist | *Roger Shawyer (EmDrive) *Guido Fetta (Cannae Drive) }} | origprop = | currentprop = | controversy = No theoretical consensus over how devices could produce thrust, if at all. | lawviolation = {{plainlist | *[[Conservation of momentum]] *[[Newton's third law]] }} | inventorclaim = }}