Difference between revisions of "Theory"
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This page will outline some candidate theories of operation (or non-operation). | This page will outline some candidate theories of operation (or non-operation). | ||
− | + | == Proponent Theories == | |
+ | * Roger Shawyer's EMDrive basic theory <ref>[[File:EmDrive Basic Theory.ppt]]</ref> | ||
+ | * Roger Shawyer's EMDrive full theory paper <ref>[http://www.emdrive.com/theorypaper9-4.pdf Roger Shawyer EMDrive Theory]</ref> | ||
+ | * Prof. Juan Yang's theory <ref>[http://www.emdrive.com/yang-juan-paper-2012.pdf Prof Juan Yang EMDrive Theory and Results]</ref> | ||
+ | * Dr. Harold Sonny White's Quantum vacuum plasma thruster model (QVP thruster) | ||
+ | * [[Evanescent waves]]<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1330521#msg1330521 2/2/15 post by @aero modeled evanescent waves] using [http://ab-initio.mit.edu/wiki/index.php/Meep MEEP]. Conclusion was that, due to rapid dropoff at the frustum surface, these were of insufficient magnitude to explain the thrust.</ref> | ||
+ | * [[@notsosureofit Hypothesis]] | ||
+ | * [[Mike McCulloch's MiHsC Theory]] | ||
+ | * [[Todd Desiato (@WarpTech)'s Evanescent Wave Theory]] | ||
+ | * Curving Rf beams<ref>[http://forum.nasaspaceflight.com/index.php?topic=37642.msg1379281#msg1379281 Post by @aero]</ref> - The magnitude of the bending needed, was not shown by the thermal camera images taken at Eagleworks. | ||
+ | * Declan Traill's suggested Classical Physics explanation <ref>[http://vixra.org/abs/1508.0043 Classical Physics explanation]</ref> | ||
− | + | == Debunking Theories == | |
+ | ''These theories should be explained, then debunked with the simplest explanation, with a link to a dedicated page to show the work or work in progress that backs up that explanation.'' | ||
− | + | === Energy and Momentum Conservation === | |
+ | If the EM Drive produces constant-acceleration it will violate [[Energy Conservation]]. | ||
+ | |||
+ | It may also violate [[Momentum Conservation]]. | ||
+ | |||
+ | EM Drive may not violate the Conservation Laws in the instance of producing a pair of neutrinos | ||
+ | (neutrinos born in EM deexitation EW process through E0 transition inside the resonator). | ||
+ | It is known that the correlation angle of the two neutrinos in the lab system | ||
+ | would be 60 deg. [Montoya-93], so an unbalanced force would appear, since neutrinos escape without interaction. | ||
+ | Unfortunately, this statement is not easy to prove in an experiment. | ||
+ | |||
+ | === Exact Standing Wave Solution of Maxwell's Equations === | ||
+ | |||
+ | On 8/5/14, Greg Egan [http://www.gregegan.net/SCIENCE/Cavity/Cavity.html posted an exact solution] for the resonant modes (for modes having constant electromagnetic field variation in the azimuthal direction, such that m=0) of a cavity in the shape of a truncated cone with spherical ends. Egan also calculated the forces and showed a proof that the net force is zero and therefore that there is no thrust force in a resonant electromagnetic cavity of any arbitrary shape, for any arbitrary mode shape, when the cavity is analyzed according to the standing wave solution of Maxwell's equations (assuming no sources or sinks in the cavity). | ||
+ | |||
+ | === Experimental Artifacts === | ||
+ | |||
+ | This assertion is that all positive experimental results are results of artifacts, such as: | ||
+ | |||
+ | * Measuring error | ||
+ | * Thermal effects | ||
+ | * Mechanical vibration | ||
+ | * Magnetic effects with environment | ||
+ | |||
+ | These are discussed in more detail at [[Possible Error Sources]]. | ||
+ | |||
+ | == References == | ||
+ | <references /> |
Revision as of 08:59, 29 April 2016
This page will outline some candidate theories of operation (or non-operation).
Contents
Proponent Theories
- Roger Shawyer's EMDrive basic theory [1]
- Roger Shawyer's EMDrive full theory paper [2]
- Prof. Juan Yang's theory [3]
- Dr. Harold Sonny White's Quantum vacuum plasma thruster model (QVP thruster)
- Evanescent waves[4]
- @notsosureofit Hypothesis
- Mike McCulloch's MiHsC Theory
- Todd Desiato (@WarpTech)'s Evanescent Wave Theory
- Curving Rf beams[5] - The magnitude of the bending needed, was not shown by the thermal camera images taken at Eagleworks.
- Declan Traill's suggested Classical Physics explanation [6]
Debunking Theories
These theories should be explained, then debunked with the simplest explanation, with a link to a dedicated page to show the work or work in progress that backs up that explanation.
Energy and Momentum Conservation
If the EM Drive produces constant-acceleration it will violate Energy Conservation.
It may also violate Momentum Conservation.
EM Drive may not violate the Conservation Laws in the instance of producing a pair of neutrinos (neutrinos born in EM deexitation EW process through E0 transition inside the resonator). It is known that the correlation angle of the two neutrinos in the lab system would be 60 deg. [Montoya-93], so an unbalanced force would appear, since neutrinos escape without interaction. Unfortunately, this statement is not easy to prove in an experiment.
Exact Standing Wave Solution of Maxwell's Equations
On 8/5/14, Greg Egan posted an exact solution for the resonant modes (for modes having constant electromagnetic field variation in the azimuthal direction, such that m=0) of a cavity in the shape of a truncated cone with spherical ends. Egan also calculated the forces and showed a proof that the net force is zero and therefore that there is no thrust force in a resonant electromagnetic cavity of any arbitrary shape, for any arbitrary mode shape, when the cavity is analyzed according to the standing wave solution of Maxwell's equations (assuming no sources or sinks in the cavity).
Experimental Artifacts
This assertion is that all positive experimental results are results of artifacts, such as:
- Measuring error
- Thermal effects
- Mechanical vibration
- Magnetic effects with environment
These are discussed in more detail at Possible Error Sources.
References
- ↑ File:EmDrive Basic Theory.ppt
- ↑ Roger Shawyer EMDrive Theory
- ↑ Prof Juan Yang EMDrive Theory and Results
- ↑ 2/2/15 post by @aero modeled evanescent waves using MEEP. Conclusion was that, due to rapid dropoff at the frustum surface, these were of insufficient magnitude to explain the thrust.
- ↑ Post by @aero
- ↑ Classical Physics explanation