As for the previous one, the level and quality of these comments is so high that the thread has become unreadable for non-physicists.Could you eventually, for the sake of not losing the majority of us too much behind, make a quick non-technical summary of what are you discussing? is there any progress or barely nothing?Thanks!
A potentially interesting sidelight:http://okomov.livejournal.com/577.htmlThe physics is descrived in vvery different terms ("Leonov’s superunification theory"?? "Antigravity") this has similar performance to what Shawyer predicts for a superconducting EmDrive thruster, i.e. 500 to 700 kg for 1kW power input.Moreover, as soon as it starts to accelerate, the thrust ceases, hence the pulsed operation in the video, which is what Shawyer claims for a high Q EmDrive thruster without Doppler compensation.What does the team think...?
For people more familiar with NASA, is that common? Does NASA as a civilian agency have a history (or policy?) of suppressing experimental results that, like this, may have military applications? In other words, can the lack of any news at all one way or the other, be taken as a sign that there might be something to this? Or is that just conspiratorial nonsense?
Quote from: saucyjack on 02/04/2015 05:46 pmFor people more familiar with NASA, is that common? Does NASA as a civilian agency have a history (or policy?) of suppressing experimental results that, like this, may have military applications? In other words, can the lack of any news at all one way or the other, be taken as a sign that there might be something to this? Or is that just conspiratorial nonsense?Rockets have military applications, but NASA does not suppress experimental results of rockets. To the contrary, they partner with companies such as SpaceX and share information for the advancement of space exploration. I'm not convinced there is a black out for EM drive technology. There appears to be a delay, which could have many causes. If there are people in the administration advocating for a black out, I think it is a mistake, and probably too late given the amount of information already in the public domain.
Anyone have the pdf? http://arc.aiaa.org/doi/abs/10.2514/6.2014-3853Also not exactly mainstream news but interesting nonetheless. http://m.disclose.tv/news/NASA_Impossible_Quantum_Space_Engine_Actually_Works/113761#DTV
Anyone have the pdf? http://arc.aiaa.org/doi/abs/10.2514/6.2014-3853
Quote from: DIYFAN on 02/04/2015 06:11 pmQuote from: saucyjack on 02/04/2015 05:46 pmFor people more familiar with NASA, is that common? Does NASA as a civilian agency have a history (or policy?) of suppressing experimental results that, like this, may have military applications? In other words, can the lack of any news at all one way or the other, be taken as a sign that there might be something to this? Or is that just conspiratorial nonsense?Rockets have military applications, but NASA does not suppress experimental results of rockets. To the contrary, they partner with companies such as SpaceX and share information for the advancement of space exploration. I'm not convinced there is a black out for EM drive technology. There appears to be a delay, which could have many causes. If there are people in the administration advocating for a black out, I think it is a mistake, and probably too late given the amount of information already in the public domain.To be fair to NASA if this does work it's such a revolutionary technology that the reporting of it is not something to be rushed into. No doubt every result is having to be checked, checked again & then checked again etc etc which no doubt slows down the release of information. Especially if on top of that there are national security implications that have to be considered as well.
Wanted to examine the inventor's theory of operation. We spent a lot of time discussing Shawyer's theory, but Fetta didn't get much discussion. Probably because his paper is paywalled. Also @Wembley, thanks for the patents. There's plenty of free info there.Break:Neat I can hit zero every half wavelength with any frequency like this. (top)Or if I mirror the diagonal of a cylinder, creating a cone I get pretty close sometimes after adjusted down 1 degree. (bottom)http://goo.gl/jF8ZJB (shortened link to ebay)Found these puppies. Emailed the seller to see what the dimensions are and to see if they are the manufacturer and whether they do custom sizes. Might be cheaper and less headache than buying a copper sheet.
It is all falling into place very nicely now
http://goo.gl/jF8ZJB (shortened link to ebay)Found these puppies. Emailed the seller to see what the dimensions are and to see if they are the manufacturer and whether they do custom sizes. Might be cheaper and less headache than buying a copper sheet.
"apx. dimensions small= 6 5/8" x 3 3/8" medium= 8" x 5" large=11" x 7 3/4" all are 7 3/4" tall . yes we do make them @ our sheet metal shop & sure we can make custom sizes. Thanks Rick"
..Folks:The Eagleworks Lab is still working on the copper frustum thruster that was reported on last summer at the AIAA/JPC. We have now confirmed that there is a thrust signature in a hard vacuum (~5.0x10^-6 Torr) in both the forward direction, (approx. +50 micro-Newton (uN) with 50W at 1,937.115 MHz), and the reversed direction, (up to -16uN with a failing RF amp), when the thruster is rotated 180 degrees on the torque pendulum. However we continue to fight through RF amplifier failures brought on by having to operate them in a hard vacuum with few $$$ resources to fix them when they break, so the desired data is coming along very slowly. We are still working on obtaining enough data though that will allow us to go to Glenn Research Center (GRC) for a replication effort in the next few months. However that will only happen if we can make the thrust signature large enough since the GRC thrust stand can only measure down to ~50uN, so we have to get the thrust signature up to at least 100uN before we can go to GRC. As to the theoretical side of Q-Thrusters, Dr. White has just developed the first cut at a quantum vacuum (QV) based plasma code written in C+ under Windows/Unix and VMD visualization software that utilizes the COMSOL E&M derived field data for a given thruster geometry that allows one to track the movement and velocity of a subset of the QV's electron/positron neutral plasma pairs in the thruster over time as they respond to the applied time varying RF E&M fields in the copper frustum resonant cavity and to each other. This package also allows one to calculate the expected thrust for a given input power and quality factor of the frustum resonant cavity based of standard plasma rocket physics. So far the estimated thrust verses experimental observations are within 2% for the first experimental data run I compared it to, but we still have a long, long road ahead of us of experimental validation before we have any real confidence in this very new Q-Thruster design tool.Best, Paul March
Quote from: Rodal on 02/06/2015 02:44 pmIt is all falling into place very nicely now ...In theory, could a dialectric be used to suppress resonance modes that might otherwise be present in an over-sized cavity?
Here's what I know about cutoff freqs of circular waveguide at least:"The cutoff wavelength of a circular guide is 1.71 times the diameter of the waveguide. ...
Got the sample pack in the mail today. Will report on performance of 10 or 16 mil soon, specifically the ability to hold shape under its own weight while being as light as possible. Now, since I found the supplier, who uses heavier 22 Mil/16 Ounce Copper (see above), these will probably end up as end caps. I don't know what I'm going to do yet, buy or roll'n'solder myself. There's tradeoffs to consider. Like time and weight. So shiny Edit:It just occurred to me that I should have enough material in hand right now to make something happen if I can find a solution to a cone based off this cylinder: http://forum.nasaspaceflight.com/index.php?topic=36313.msg1320981#msg1320981What do you think @Rodal? Do we have enough to confidently calculate a frustum of a cone that works and will fit within a 12"x12" sheet? The cylinder fits at least. I'm quite happy staying with 2.45ghz, TE111 for now. I don't care about finding the best mode for max thrust, just any thrust.