Quote from: Rodal on 03/16/2016 04:35 pmusing a given geometry (thickness, diameters, length) and using pure copper as material input. For my runs, I have been using pure copper at 0.1cm wall thickness. When running monopole sims, I'm a little uncertain what diameter to make the antenna. Shell showed me some images and took some measurements, and it looks like 0.5 to 0.7cm. Both antenna design and placement are critical depending on the modes you want to excite. I think i'm going to help illustrate this by running frequency sweeps (2 - 3Ghz) on the same frustum dimensions, but with a number of different antenna types and locations.
using a given geometry (thickness, diameters, length) and using pure copper as material input.
Quote from: Monomorphic on 03/16/2016 04:54 pmQuote from: Rodal on 03/16/2016 04:35 pmusing a given geometry (thickness, diameters, length) and using pure copper as material input. For my runs, I have been using pure copper at 0.1cm wall thickness. When running monopole sims, I'm a little uncertain what diameter to make the antenna. Shell showed me some images and took some measurements, and it looks like 0.5 to 0.7cm. Both antenna design and placement are critical depending on the modes you want to excite. I think i'm going to help illustrate this by running frequency sweeps (2 - 3Ghz) on the same frustum dimensions, but with a number of different antenna types and locations. Good idea...it was originally suggested to me to off-center the RF insert on the large diameter...did that but no cigar. Went to centering it on the large plate. Side insertion was also a topic of discussion...centered or offset? Seems depends on whom you asked.Nice that you have the modeling, but I will say this, models have described modes, but I remain unconvinced there is a magic mode that needs to be designed for (yet anyway). Otherwise, we'd have blueprints and working EMDrives all over the planet.Here's something else to think about, Eagleworks' project is dead...for all intents and purposes. Dead in the fact that there is an information blackout that has been in effect for many months. Designing something to try and match a 2-3 year old design whose specifics have not been released is counterproductive IMHO.I can tell you that there were rumblings that the 2014 tests yielded results WITHOUT a dielectric. I cannot say any more than that as am trying to respect the overall blackout. That being an old 2014 test, seems OK to provide the info. So...long story short...no one has a magic design yet so feel free to experiment with the guidance you have here...you will get some who want you to do this or that...but the key word here is YOU.
If the NASA EW project would be completely dead I guess we would have at least some post from Star-Drive to have some closure I think.
Quote from: Chrochne on 03/16/2016 05:41 pmIf the NASA EW project would be completely dead I guess we would have at least some post from Star-Drive to have some closure I think. Indeed. If one day they said "the show is over, people", I'm certain most of us would like to know.The very reason why I keep an eye of this, is because it's believable enough that some serious institutional effort has been mustered to test it.If they say "it doesn't work", then it's time to move on.
The data shown in Fig. 3 and 7 demonstrate that in the electromagnetic drive thrust increases by several orders of magnitude compared to photon rockets. In the Yang-Mills theory, this increase can be explained by the fact that nonlinear waves carry momentum from the system more effectively than photons.In the present study we examined the mechanism of excitation waves in the Yang-Mills field, leading to the appearance of traction effect at resonance of electromagnetic waves in a conical cavity.The inclusion of the Yang-Mills field in the model has a double scientific interest. On the one hand, this model allows us to explain the processes in electromagnetic drive. On the other hand, these devices themselves may be used to register the mechanical effects caused by the Yang-Mills field.
Here's a question for people, apologies if it was asked/answered before.What sort of effect does having a less rounded frustum have on things?I've been toying around with a design for a re-configurable frustum. Sort of like a three dimensional iris shutter system. While I "should" be able to figure out how to make the blades rounded, unless I get super fancy with adjustable curves on the blades, they will still somewhat only be optimized for a particular shape.Additionally, is having the RF input on the side of the frustum necessary compared with one of the endplates?The goal of this particular mental exercise is to attempt to come up with a design of a frustum that can to some extent have most variables about its shape adjustable via computer control (possibly via stepper motors).Thanks-Mazon
Quote from: MazonDel on 03/16/2016 07:15 pmHere's a question for people, apologies if it was asked/answered before.What sort of effect does having a less rounded frustum have on things?I've been toying around with a design for a re-configurable frustum. Sort of like a three dimensional iris shutter system. While I "should" be able to figure out how to make the blades rounded, unless I get super fancy with adjustable curves on the blades, they will still somewhat only be optimized for a particular shape.Additionally, is having the RF input on the side of the frustum necessary compared with one of the endplates?The goal of this particular mental exercise is to attempt to come up with a design of a frustum that can to some extent have most variables about its shape adjustable via computer control (possibly via stepper motors).Thanks-MazonThink I might have answered this on TT's site, but think slipping plates will cause a resonance problem and low Q.Here's something to consider. Do what I did on my first design, construct the sidewalls with copper mesh screen, 11 threads per inch, use adjustable compression bands at 3 places along the sidewall. Mesh is quite pliable and it does give good resonance. Side-mount injection is not my choice and would be difficult with this or similar methodology.
Quote from: rfmwguy on 03/16/2016 08:29 pmQuote from: MazonDel on 03/16/2016 07:15 pmHere's a question for people, apologies if it was asked/answered before.What sort of effect does having a less rounded frustum have on things?I've been toying around with a design for a re-configurable frustum. Sort of like a three dimensional iris shutter system. While I "should" be able to figure out how to make the blades rounded, unless I get super fancy with adjustable curves on the blades, they will still somewhat only be optimized for a particular shape.Additionally, is having the RF input on the side of the frustum necessary compared with one of the endplates?The goal of this particular mental exercise is to attempt to come up with a design of a frustum that can to some extent have most variables about its shape adjustable via computer control (possibly via stepper motors).Thanks-MazonThink I might have answered this on TT's site, but think slipping plates will cause a resonance problem and low Q.Here's something to consider. Do what I did on my first design, construct the sidewalls with copper mesh screen, 11 threads per inch, use adjustable compression bands at 3 places along the sidewall. Mesh is quite pliable and it does give good resonance. Side-mount injection is not my choice and would be difficult with this or similar methodology.During the writing of my previous post, I did have the idea of adjustable bars (in place of the blades) that could manipulate some sort of metallic cloth around and decided to do some looking before mentioning. At a glance, something like http://www.lessemf.com/fabric4.html#1212 was what I was thinking. Does something like the fabric or mesh make sense from an end-plate perspective?Definitely having end-plate injection would simplify my setup. On an aside about that, there is probably no real value in having an ability to similarly offset the RF port is there? It wouldn't be that hard to do with an end-plate, for what I have in mind if people thought there would be value in it.-Mazon
This is the only photographic evidence we have of how and where Rf was injected into the SPR Flight Thruster, which is the most modern non cryo design. That Rf coax injection by a coupler (sort of antenna) of some design.
Therefore I think you should wait until Monomorphic runs a comparison of the effect of random distortions of each end, and of the sidewalls on the Q, before making a decision on how to proceed.
Quote from: Rodal on 03/16/2016 10:46 pmTherefore I think you should wait until Monomorphic runs a comparison of the effect of random distortions of each end, and of the sidewalls on the Q, before making a decision on how to proceed.I'm working on doing just that. I hope to have something by this weekend. The higher number of triangles in these meshes (500+) greatly increases the compute time and I've been pretty busy this week. I'm also going to work with aero on comparing FEKO and MEEP runs. Hope to have results on that in the next day or so.
Quote from: TheTraveller on 03/16/2016 10:23 pmThis is the only photographic evidence we have of how and where Rf was injected into the SPR Flight Thruster, which is the most modern non cryo design. That Rf coax injection by a coupler (sort of antenna) of some design.Can anyone tell me what this square thing is protruding near the RF coax inject? Is it some kind of mechanism for changing the shape of the antenna?
Quote from: Monomorphic on 03/16/2016 10:37 pmQuote from: TheTraveller on 03/16/2016 10:23 pmThis is the only photographic evidence we have of how and where Rf was injected into the SPR Flight Thruster, which is the most modern non cryo design. That Rf coax injection by a coupler (sort of antenna) of some design.Can anyone tell me what this square thing is protruding near the RF coax inject? Is it some kind of mechanism for changing the shape of the antenna? My best guess is that it is a matching stub. Note the screw adjustment on the left of the box. No idea on the interior antenna design.
emdrive will be on the bbc horizon episode per this articlehttp://www.radiotimes.com/episode/d2zck4/horizon--project-greenglow-the-quest-for-gravity-control