I am not sure, but the fact noone replied to this thread yet might mean that you should have posted this on the EM Drive thread, instead of opening a new thread.
If currents are out of phase by pi/2 and separated a distance lambda/4...
QuoteIf currents are out of phase by pi/2 and separated a distance lambda/4...The first suspicion I'd have if such an arrangement generated thrust is a photon rocket. That description fits a well known directional antenna.From a practical perspective a "propellantless" thruster isn't interesting unless it delivers more thrust than a photon rocket with the same power input.
You can't get a propellantless drive with known physics. It's true that known physics might be wrong in places and that might allow propellantless propulsion. But not with known physics.All of known physics has been mathematically shown to always conserve momentum and energy, and you can't get around that with a quantum vacuum. The quantum vacuum is part of known physics, and it is known that there's no way to transfer momentum to or from the quantum vacuum.So all everything mentioned on this thread is nonsense. None of it is based on new physics, it's all misunderstanding of the details of known physics.There's no need to read any of the papers to know this, any more than it's necessary to read a paper claiming to show pi is rational. Once you have a mathematical proof of something, there's no need to read through the details of claiming something that contradicts that. And these propellantless propulsion ideas are all in that category since they are all based on known physics.A photon drive is not propellantless since the photons carry momentum. Photon drives have huge Isp but very, very tiny energy efficiency, and nothing that only emits photons can do better (or worse) than any photon drive.