Just hypothetically, what happens if everyone flies around in those? With thrust forces in the kilonewton range.If the EM drive creates its acceleration by "pushing against the quantum vacuum", would that yield measurable residual effects for matter riding the wake of an em drive? Like thrust fluctuations in another EM drive flying directly behind a first one, or measurable forces on masses that are placed in the thrust vector? Or spacetime distortions and eddies, like some proposed warp drive designs would create?Could the presence and operation of an EM drive be detected from a distance?(I know I'm mixing a lot of concepts here that have nothing directly to do with each other. Just food for thoughts)
This interesting article summarizes Liv A. Rivlin works on photon inertial mass and its relation to waveguide cross-section variations:http://www.mathnet.ru/php/archive.phtml?wshow=paper&jrnid=qe&paperid=2500&option_lang=engSome ideas he proposes could shed light in other theories (say MiHsC) that need a physical mass equivalence for the amount of radiation confined in a cavity.Photon rest mass exists when they are confined, is non-zero, and is determined by the geometry of the waveguide, and this mass can vary with the diameter. "Photon rest mass is equal to the work performed by an external force against the mode field force during the waveguide formation when the radiation pressure is 'raked' from infinite space (originally zero frequency or infinite wavelength) into the limited volume of the waveguide"... ..."The proper photon mass in the waveguide, defined as the equivalent of the energy mentioned above, serves in different situations precisely as the inertial and gravitational mass in the standard meaning of these concepts."
This interesting article summarizes Lev A. Rivlin works on photon inertial mass and its relation to waveguide cross-section variations:http://www.mathnet.ru/php/archive.phtml?wshow=paper&jrnid=qe&paperid=2500&option_lang=engSome ideas he proposes could shed light in other theories (say MiHsC) that need a physical mass equivalence for the amount of radiation confined in a cavity.Photon rest mass exists when they are confined, is non-zero, and is determined by the geometry of the waveguide, and this mass can vary with the diameter. "Photon rest mass is equal to the work performed by an external force against the mode field force during the waveguide formation when the radiation pressure is 'raked' from infinite space (originally zero frequency or infinite wavelength) into the limited volume of the waveguide"... ..."The proper photon mass in the waveguide, defined as the equivalent of the energy mentioned above, serves in different situations precisely as the inertial and gravitational mass in the standard meaning of these concepts."This is really a good starting point to do some engineering playing with diameters, frequencies and accelerations (Shawyer is indicating us that for observing a measurable thrust, there is necessary some initial acceleration). The recipe, more or less, could be to generate "stopped light", by modifying confinement geometries/cavity accelerations, so the radiation could leave inertia at rest. "Equations (6.4) and (6.13) explain the difference between longitudinal and transverse masses: while both being proportional to the proper photon mass M, ML and MT are manifestations of the photon inertia in different types of accelerated waveguide motion. The longitudinal accelerated photon motion constitutes simply wave propagation with changing frequency through the waveguide. The transverse photon motion consists in the acceleration of the wave together with the waveguide confining it, as a whole".This can be the explanation of different inertia if the EmDrive is in an upright position or in a lateral position respect to the external acceleration (or respect to Earth gravity). Following Lev A. Rivlin schema, could be possible to interchange or convert longitudinal mass into transverse mass, so the inertia is reduced for motion in one preferred direction, and CoM is not broken.
The very old (it goes back 100 years) viewpoint of apportioning mass from the field to particles (although still works if one includes all terms in the equations of motion) suffers from the arbitrariness of having to apportion somehow also the cross-contribution from several interacting particles, and it also suffers from the viewpoint that we know from Quantum Mechanics that particles (also photons) are both particle and wave, and not confined to a point in space.
EW's TM212 Frustum, Cu walls (5.8E7 S/m) Polyethylene disc (eps_r = 2.25) using eigenmode solverFrequency was 1.97 GHz, not 1.94 , maybe due to antenna, small distortions in copper walls etc Interesting results...
In regards to NASA's apparent lack of funding for more research and testing, is there any bureaucratic will to allow outside funding from GoFundMe or Kickstarter, administered through NASA? While Dave and Shell and other DIY'ers have received some funding, with an imprimatur from NASA with plenty of caveats about experimental risks, I could see hundreds of thousands being raised without much trouble.