Quote from: SeeShells on 06/28/2015 06:33 pmQuote from: wallofwolfstreet on 06/28/2015 06:16 pmSorry to interrupt the great modeling work going on right now, but I condensed some of the recent findings on the intellectual property and financial aspects of SPR into a reddit post. To summarize, it looks like SPR has had alot more money move through the organization over the last 15 years than originally thought. It has received roughly 600,000 pounds in grants, loans and equity. This is about 950,000 USD at current exchange rates. If we adjust the time at which SPR received its' financing for inflation (grants received in 2000, over 250,000 pounds of equity in 2005), we get that SPR has had well over 1 million USD in total financing, in 2015 dollars.As I wrote in the attached reddit post, I consider this very suspect. A few patents, a few test articles and zero sales or licensing (at least licensing that SPR would actually get paid for) of any kind is very hard to justify given the resources at SPR had at its' disposal. I've been involved in many high tech projects and even ran my own multimillion dollar companies in very high tech and there is no way one person could do this kind of science by him/herself and expect clean and clear answers. This science takes a team and even with the brains here (self excluded) it's one tough nut to crack.Although to credit RS he has taken this a long way and has been very myopic determined to seeing it happen and that is a good quality to have. I'll give him credit where credit it due.ShellThe "myopic determination" is IMHO his Achillles heel. I still don't understand why hasn't he sought help from UK Universities: they have so many great scientists in the UK, at Cambridge, Oxford, etc.. Why he continues to insist on his insufficient explanations instead of seeking the help of mainstream scientists is beyond me. That lack of working with mainstream scientists IMHO is so odd, that I see it as a negative concerning the reality of the EM Drive. IMHO either it is an experimental artifact, or if it works as space propulsion it must be due to something different from Shawyer's explanations.Making a discovery and attributing it to a wrong explanation is actually common in Astrophysics. In 1965 an initial claim was made by mainstream scientists that there might be intensity variations of intelligent origin in radio emission from the quasar CTA-102 - but this was quickly retracted. Then in 1967 when the first pulsar was discovered it was briefly thought that perhaps its precise 1.33730113-second repetition rate might be of intelligent origin.The difference is those explanations by mainstream scientists at major universities and institutions were quickly retracted. RS insistence on his kludgy explanations, for decades, even after the "New Scientis" article fiasco, and not seeking mainstream scientists' help is odd.
Quote from: wallofwolfstreet on 06/28/2015 06:16 pmSorry to interrupt the great modeling work going on right now, but I condensed some of the recent findings on the intellectual property and financial aspects of SPR into a reddit post. To summarize, it looks like SPR has had alot more money move through the organization over the last 15 years than originally thought. It has received roughly 600,000 pounds in grants, loans and equity. This is about 950,000 USD at current exchange rates. If we adjust the time at which SPR received its' financing for inflation (grants received in 2000, over 250,000 pounds of equity in 2005), we get that SPR has had well over 1 million USD in total financing, in 2015 dollars.As I wrote in the attached reddit post, I consider this very suspect. A few patents, a few test articles and zero sales or licensing (at least licensing that SPR would actually get paid for) of any kind is very hard to justify given the resources at SPR had at its' disposal. I've been involved in many high tech projects and even ran my own multimillion dollar companies in very high tech and there is no way one person could do this kind of science by him/herself and expect clean and clear answers. This science takes a team and even with the brains here (self excluded) it's one tough nut to crack.Although to credit RS he has taken this a long way and has been very myopic determined to seeing it happen and that is a good quality to have. I'll give him credit where credit it due.Shell
Sorry to interrupt the great modeling work going on right now, but I condensed some of the recent findings on the intellectual property and financial aspects of SPR into a reddit post. To summarize, it looks like SPR has had alot more money move through the organization over the last 15 years than originally thought. It has received roughly 600,000 pounds in grants, loans and equity. This is about 950,000 USD at current exchange rates. If we adjust the time at which SPR received its' financing for inflation (grants received in 2000, over 250,000 pounds of equity in 2005), we get that SPR has had well over 1 million USD in total financing, in 2015 dollars.As I wrote in the attached reddit post, I consider this very suspect. A few patents, a few test articles and zero sales or licensing (at least licensing that SPR would actually get paid for) of any kind is very hard to justify given the resources at SPR had at its' disposal.
The author is grateful for the assistance givenby colleagues in SPR Ltd, by Dr R B Paris ofAbertay University, Dundee, by J W Spiller ofAstrium UK Ltd and by Professor J Lucas ofThe University of Liverpool. The earlytheoretical work and experimentalprogrammes were carried out with supportfrom the Department of Trade and Industryunder their SMART award scheme, and thenunder a Research and Development grant.
At drive frequency of 2.45 GHz exactly, meep calculates Q ~100,000 but spits back the resonant frequency of 2.44357 GHz. I think that should work.I'll now run some field patterns.But a question. What do you estimate the noise bandwidth will be for your source? At BW = 0.04 *freq., meep only finds one frequency. With a wider BW, it might (likely would) find more than one.aero
Quote from: aero on 06/28/2015 11:23 pmAt drive frequency of 2.45 GHz exactly, meep calculates Q ~100,000 but spits back the resonant frequency of 2.44357 GHz. I think that should work.I'll now run some field patterns.But a question. What do you estimate the noise bandwidth will be for your source? At BW = 0.04 *freq., meep only finds one frequency. With a wider BW, it might (likely would) find more than one.aeroShould have a -70 dbm ultimate floor can only guess its about 500khz wide at that point. Jt js an unmodulated fm source at 2.45 ghz
Quote from: aero on 06/28/2015 11:23 pmAt drive frequency of 2.45 GHz exactly, meep calculates Q ~100,000 but spits back the resonant frequency of 2.44357 GHz. I think that should work.I'll now run some field patterns.But a question. What do you estimate the noise bandwidth will be for your source? At BW = 0.04 *freq., meep only finds one frequency. With a wider BW, it might (likely would) find more than one.aeroI have 2 licenses to run Mathematica concurrently, but both machines are running now and they will continue to run other programs for the rest of the evening. So I cannot run Mathematica now to give you any further information than the natural frequency I gave you. I estimate (but I maybe wrong) that TM114's frequency is 0.8% higher than TE013, TE114 is 3.9% higher frequency, TM212 is 6.5% lower and TE213 is 9.2% lower. frequency.
27-Jun-2015 Transverse Electric animation1 frame/sec to 10 frames/sec (click later in the video for faster animation).I have the tool path and presets down now, can do one of these in about 20 minutes...
Quote from: VAXHeadroom on 06/29/2015 01:10 am27-Jun-2015 Transverse Electric animation1 frame/sec to 10 frames/sec (click later in the video for faster animation).I have the tool path and presets down now, can do one of these in about 20 minutes...Mesmerizing !Looking forward to seeing the next one
Quote from: Rodal on 06/29/2015 01:31 amQuote from: VAXHeadroom on 06/29/2015 01:10 am27-Jun-2015 Transverse Electric animation1 frame/sec to 10 frames/sec (click later in the video for faster animation).I have the tool path and presets down now, can do one of these in about 20 minutes...Mesmerizing !Looking forward to seeing the next one Really cool, but is this with a loop antenna? Shouldn't it be rotated 90 deg, and be parallel to the end plate so the magnetic field is axial? Maybe I just don't know what I'm looking at. It would be nice to know which color is peak and which color is a node of the wave.Todd
Quote from: rfmwguy on 06/28/2015 11:45 pmQuote from: aero on 06/28/2015 11:23 pmAt drive frequency of 2.45 GHz exactly, meep calculates Q ~100,000 but spits back the resonant frequency of 2.44357 GHz. I think that should work.I'll now run some field patterns.But a question. What do you estimate the noise bandwidth will be for your source? At BW = 0.04 *freq., meep only finds one frequency. With a wider BW, it might (likely would) find more than one.aeroShould have a -70 dbm ultimate floor can only guess its about 500khz wide at that point. Jt js an unmodulated fm source at 2.45 ghzMeep can't even approach that narrow a noise bandwidth. 0.04 is stressing it, and 0.004 is out of the question. Should I then run the field patterns using a continuous source with no noise? I guess that is my only choice.
Quote from: WarpTech on 06/29/2015 01:41 amQuote from: Rodal on 06/29/2015 01:31 amQuote from: VAXHeadroom on 06/29/2015 01:10 am27-Jun-2015 Transverse Electric animation1 frame/sec to 10 frames/sec (click later in the video for faster animation).I have the tool path and presets down now, can do one of these in about 20 minutes...Mesmerizing !Looking forward to seeing the next one Really cool, but is this with a loop antenna? Shouldn't it be rotated 90 deg, and be parallel to the end plate so the magnetic field is axial? Maybe I just don't know what I'm looking at. It would be nice to know which color is peak and which color is a node of the wave.ToddNo, it's a dipole. I don't know how to model a loop. The June 26 data had the antenna parallel to the end plate, the June 27 data it was axial. Both cases centered half wavelength from the small end.
How to waste precious time on the build - spent 4hrs trying to get the cheap 100mw exciter to fire up...junk from china without an online manual. Its not the ten bucks, its the time wasted. Moral of story, get a well documented board or module. Forget troubleshooting, surface mount components, electronics hardware is throw away stuff now, which I just did
Quote from: rfmwguy on 06/29/2015 03:04 amHow to waste precious time on the build - spent 4hrs trying to get the cheap 100mw exciter to fire up...junk from china without an online manual. Its not the ten bucks, its the time wasted. Moral of story, get a well documented board or module. Forget troubleshooting, surface mount components, electronics hardware is throw away stuff now, which I just did Sorry to hear that, rfmwguy.I'm awaiting to see if I will soon be in the same boat with the stuff I ordered as well.I don't know when I'll learn that you can't afford to go cheap.