Quote from: Notsosureofit on 02/24/2015 01:22 amAnyway, still thinking about a possible experiment in vacuum using:https://www.dropbox.com/s/cmxyj7re8rrb6dh/IMAG0361.jpg?dl=0to make a stack chamber like:https://www.dropbox.com/s/wf8wv226h8138n1/IMAG0360.jpg?dl=0but on an isolation stand.The idea would be to then balance a tapered oscillator (Gunn Diode ?) cavity and a battery pack w/ a remote photo-switch on a beam held by a suspension fiber and monitor the rotation. I'm thinking one could get some sensitivity multiplication by switching the cavity on and off in time w/ the oscillation frequency of the assembly (easy to do w/ a digital camera) and see if the oscillation amplitude increases w/ time.Anyone want to try a sensitivity calculation ? Comments ?Do you have this report by Brito, Marini and Gallian, using a Cavendish balance, batteries for power input, oil damping, counterweight and laser measurements ? http://enu.kz/repository/2009/AIAA-2009-5070.pdf
Anyway, still thinking about a possible experiment in vacuum using:https://www.dropbox.com/s/cmxyj7re8rrb6dh/IMAG0361.jpg?dl=0to make a stack chamber like:https://www.dropbox.com/s/wf8wv226h8138n1/IMAG0360.jpg?dl=0but on an isolation stand.The idea would be to then balance a tapered oscillator (Gunn Diode ?) cavity and a battery pack w/ a remote photo-switch on a beam held by a suspension fiber and monitor the rotation. I'm thinking one could get some sensitivity multiplication by switching the cavity on and off in time w/ the oscillation frequency of the assembly (easy to do w/ a digital camera) and see if the oscillation amplitude increases w/ time.Anyone want to try a sensitivity calculation ? Comments ?
I've tried to do searches of multiple types, and have read a few dozen posts, but I still can't answer what seems to be a very simple question, so I'm going to ask.Has anyone verified that this isn't turning itself into some type of amplified photonic thruster?
there can be no amplification of these waves since evanescent waves are exponentially decaying (not resonant) by definition
Quote from: Notsosureofit on 02/24/2015 01:22 am.....The idea would be to then balance a tapered oscillator (Gunn Diode ?) cavity Disassembled radar speed gun. The grey assembly attached to the end of the copper-colored horn antenna is the Gunn diode oscillator which generates the microwaves.From Wikipedia http://en.wikipedia.org/wiki/Gunn_diode
.....The idea would be to then balance a tapered oscillator (Gunn Diode ?) cavity
Do you have this report by Brito, Marini and Gallian, using a Cavendish balance, batteries for power input, oil damping, counterweight and laser measurements ? http://enu.kz/repository/2009/AIAA-2009-5070.pdf
Quote from: Rodal on 02/24/2015 01:56 amQuote from: Notsosureofit on 02/24/2015 01:22 am.....The idea would be to then balance a tapered oscillator (Gunn Diode ?) cavity Disassembled radar speed gun. The grey assembly attached to the end of the copper-colored horn antenna is the Gunn diode oscillator which generates the microwaves.From Wikipedia http://en.wikipedia.org/wiki/Gunn_diodeYup! That should do it. Haven't found where I put that Gunn oscillator yet (just had it a couple months ago)If anyone has one of those speed guns in the drawer I won't ask where you got it .......
I thought somewhere Dr March had said that GRS's balance sensitivity required an improvement of the thrust signal by 100 percent in order to get successful replication. Did I get that right? I cannot find it now and I have been looking back through the thread for 20 minutes or more. -Anyway; with a deadline of EOM, march; does that mean there is an improved test article about to or in the process of undergoing additional testing at Eagleworks? and can someone link to where that fact (GRS sensitivity limits incapable of detecting current thrust signal level) was posted for reference?
The Glenn Research Center (GRC) torque pendulum test rig has a reported sensitivity of ~50 micro-Newton (uN), so we will need a consistent copper frustum thrust performance of at least 100uN to be assured of a successful replication effort at the GRC facility. And no we don't have another test article that performs better than the copper frustum
Quote from: Lee Jay on 02/24/2015 01:51 amI've tried to do searches of multiple types, and have read a few dozen posts, but I still can't answer what seems to be a very simple question, so I'm going to ask.Has anyone verified that this isn't turning itself into some type of amplified photonic thruster?I have suggested something like that. Photons with superluminal momentum or superluminal velocity (a different reference) escaping the cavity via evanescent waves. The references haven't gotten much traction and I've busy with meep so haven't delved into the math. http://wwwsis.lnf.infn.it/pub/INFN-FM-00-04.pdf (See Appendix B, page 15.) People who've looked at the reference get hung up on the causality paradox and can't seem to get past that to look at the math. My opinion on that is that if the math gives good estimates of the thruster performance, then maybe the paper's author has a valid argument about the causality paradox. Or maybe delve into the tachyon math to see if the paradox really exists in this case.@Rodal - Quote there can be no amplification of these waves since evanescent waves are exponentially decaying (not resonant) by definition But I think that is the part of the point where the math of superluminal evanescent waves diverge from the classic math. The reference claims to show that the velocity of the wave is a function of the cavity diameter and the gap diameter. If that function of velocity is anything like diameter divided by gap size then the momentum of a single photon could be amplified enormously. Huge momentum from a small number of photons and small number of photons from a small power consumed. I guess I'll have to set meep aside and delve into MAXIMA just to satisfy myself.
where is the blue glowy stuff? (i like blue glowy stuff. )
i know if you remove the IR filter from a regular electronic camera you can turn a normal camera (on a cell phone for example) into a night vision camera. Perhaps there is a way to hack a camera to do the same thing with UV light.
QuoteThe Glenn Research Center (GRC) torque pendulum test rig has a reported sensitivity of ~50 micro-Newton (uN), so we will need a consistent copper frustum thrust performance of at least 100uN to be assured of a successful replication effort at the GRC facility. And no we don't have another test article that performs better than the copper frustumYou may have to resort to the Chinese method, and latch in the most powerful magnetron you can lay hands on.
...I take it that this is a hanging Pendulum? ...
Quote from: JasonAW3 on 02/24/2015 02:16 pm...I take it that this is a hanging Pendulum? ...NASA Eagleworks has not used a hanging pendulum for their measurements.They have used a low thrust torsion pendulum. See the report for further details: http://www.libertariannews.org/wp-content/uploads/2014/07/AnomalousThrustProductionFromanRFTestDevice-BradyEtAl.pdf
Quote from: Rodal on 02/24/2015 02:54 pmQuote from: JasonAW3 on 02/24/2015 02:16 pm...I take it that this is a hanging Pendulum? ...NASA Eagleworks has not used a hanging pendulum for their measurements.They have used a low thrust torsion pendulum. See the report for further details: http://www.libertariannews.org/wp-content/uploads/2014/07/AnomalousThrustProductionFromanRFTestDevice-BradyEtAl.pdfCould a magnetic field cause issus with this sort of pendulum? Especially some form of rotating field?
QuoteDo you have this report by Brito, Marini and Gallian, using a Cavendish balance, batteries for power input, oil damping, counterweight and laser measurements ? http://enu.kz/repository/2009/AIAA-2009-5070.pdfPossibly a stupid question, but was this team using the most productive 'mode/frequency' for the size of their frustum? Having the right mode seems to be crucial to the correct functioning of this device.