I'm working on the losses of energy through the perforated copper asymmetrical waveguide and perforated endplates on my EMDrive design. I've found it's important to look at each hole as a tiny little waveguide and the incident angle of reflection of the 2.45 GHZ propagating wave within the cavity effecting it... so I'm number crunching.Before I head back into disproving the heavy flack I've gotten in using a perforated copper frustum I want to as Dr. Rodal a question that was bugging me as I reviewed the images dancing in my head (like counting sheep) before falling to sleep last night.Why does sequence of images show increasing levels of activity outside of the frustum solid boundary walls in your simulation? Stepping through each one it was apparent when you're calculating the stress tensor component strengths it shows up outside the cavity. Is this an artifact?Ok back at crunching.Todd, looks like great info and will read a later this morning.TT, nice bluetooth setup, make sure you wear your perforated foil hat when running to protect your gray matter.Shell
Quote from: SeeShells on 07/13/2015 11:11 amI'm working on the losses of energy through the perforated copper asymmetrical waveguide and perforated endplates on my EMDrive design. I've found it's important to look at each hole as a tiny little waveguide and the incident angle of reflection of the 2.45 GHZ propagating wave within the cavity effecting it... so I'm number crunching.Before I head back into disproving the heavy flack I've gotten in using a perforated copper frustum I want to as Dr. Rodal a question that was bugging me as I reviewed the images dancing in my head (like counting sheep) before falling to sleep last night.Why does sequence of images show increasing levels of activity outside of the frustum solid boundary walls in your simulation? Stepping through each one it was apparent when you're calculating the stress tensor component strengths it shows up outside the cavity. Is this an artifact?Ok back at crunching.Todd, looks like great info and will read a later this morning.TT, nice bluetooth setup, make sure you wear your perforated foil hat when running to protect your gray matter.ShellThe stress outside the EM Drive is zero in all cases I recall (have I missed one? -- in which case please indicate the figure ?) . The planes outside the EM Drive have different color because I plotted them with automatic Max Min rendering to show the shape of each stress field no matter how much smaller amplitude. A plot ranging from 0 to +0.02 will show a blue plane for 0, while a plot ranging from 0 to -0.02 will show a red plane for 0.In this case (unlike in the early Meep figures) it is OK to do this because I am showing the numerical magnitude of the stress tensor in the vertical axis. In the early Meep output that was made into movies, no numerical magnitude was being shown.Please notice that the numerical magnitude of the stress generated by the antenna at its maximum is several times greater than the stress shown in other images.If there would be an interest in making movies out of this, they would need to be re-plotted as follows:1) Same Max Min 2) Fix the space view
IMO, it would be more important to measure the energy and frequency stored at the small end, vs the energy and frequency stored at the big end, and maximize the difference. The Q means nothing, what matters is the difference in potential energy between the two ends.Todd
Quote from: WarpTech on 07/13/2015 04:48 amIMO, it would be more important to measure the energy and frequency stored at the small end, vs the energy and frequency stored at the big end, and maximize the difference. The Q means nothing, what matters is the difference in potential energy between the two ends.ToddI do hope we're not entering TT Brown "asymmetric capacitor" country with that remark. I think we all know that that particular line of enquiry ended badly!
TT, nice bluetooth setup, make sure you wear your perforated foil hat when running to protect your gray matter.
I posted a Danger alert and it went poof. Summary as I'll try again, weird.I asked why the shape of the calculated stress values were shaped around the antenna like they were, squeezed in the forward accelerating direction and flattened out to the sides.It reminds me of Einstein effects for an object approaching the speed of light. Interesting all other meep views were of this nice round antenna shape.Just wondering how that compressed stress took that shape.Shell
...There will be a significant Faraday Shield around the EMDrive. If the BlueTooth can't connect, will increase it to a double Faraday Shield with optional additional full mu-metal shield to block out low H field leakage as well. Remember min wall thickness is 2mm and I can reduce Rf amp power down to 79mWs. Don't expect any issues but if they occur I know how to deal with them. The BlueTooth link, when doing cordless rotates, will be operational....
I think we should not entertain gossip about Eagleworks testing until Star-Drive re-appears, as engaging in such discussion may jeopardize NASA Eagleworks's ongoing efforts, giving NASA's response to the "warp-drive" media articles.
Quote from: Rodal on 07/13/2015 04:24 pmI think we should not entertain gossip about Eagleworks testing until Star-Drive re-appears, as engaging in such discussion may jeopardize NASA Eagleworks's ongoing efforts, giving NASA's response to the "warp-drive" media articles.Understandable. Thanks!
Concept drawing previously posted by Star-Drive (Paul March) for a magnetron feeding RF to a water-cooled EM Drive at the center of the small base of the EM Drive.EDIT: Paul March also uses spherical (instead of flat) ends, and places the magnetron at the apex of the cone, extending the EM drive towards the minimum small base diameter possible to accommodate the magnetron. Not concerned about "cut-off" nonsense limits based on cylindrical waveguides (that do not apply to truncated cones). He also plans to excite the lowest natural frequency TM010, which has the highest amplitude of all modes. Also his design to use the present NASA frustum with an internal partition to resonate at 2.45 GHz in the lower mode, higher amplitude TE011 for the Interferometer tests.EM Drive testers could use a similar partition to investigate resonance at lower modes, which should exhibit higher amplitude, without needing to cut the EM Drive permanently
Quote from: marshallC on 07/13/2015 04:31 pmQuote from: Rodal on 07/13/2015 04:24 pmI think we should not entertain gossip about Eagleworks testing until Star-Drive re-appears, as engaging in such discussion may jeopardize NASA Eagleworks's ongoing efforts, giving NASA's response to the "warp-drive" media articles.Understandable. Thanks!There is a short-fim made about this (if you speak German, turn-off the sound and just read the English subtitles) :http://captiongenerator.com/48295/Hitler-Reacts-to-current-EmDrive-Situation