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#120
by
HMXHMX
on 30 Aug, 2016 02:25
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#121
by
tchernik
on 30 Aug, 2016 02:39
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Our own Dr. Rodal has his name in the paper:
http://tinyurl.com/zhu2had
For a popular media article, this is pretty good. Seems the journalists did their homework this time.
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#122
by
Bob Woods
on 30 Aug, 2016 03:22
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Agreed. They read it here first....
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#123
by
Tcarey
on 30 Aug, 2016 04:27
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A couple of last minute improvements before I resume regular testing. I've removed all zinc (ferromagnetic) machine screws from the build and replaced with all brass and some stainless steel.
Monomprphic:
You don't mention testing the stainless steel to see it is magnetic or not. Some forms are quite magnetic others are not. Given your goal, I hope you have tested that hardware with a strong magnet.
Looks like your build is progressing nicely. Good testing with it.
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#124
by
mwvp
on 30 Aug, 2016 05:18
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... it appears to me they are suggesting the quantum vacuum is made up of anti-matter and matter? Some charged and even uncharged. This one appears to take into account spatial structure and the electro-magnetic properties. Is it just me or does it suggest a capacitor could cause polarization of the Quantum Vacuum also? Maybe the energies required would be too much but I wonder if there could be a frequency dependence or resonance of the QV.
I found:
http://lib.org.by/get/P_Physics/PQft_Quantum%20field%20theory/PQed_Quantum%20electrodynamics/Milonni%20P.W.%20The%20quantum
%20vacuum..%20introduction%20to%20QED%20%28AP%2C%201994
%29%28ISBN%200124980805%29%28KA%29%28T%29%28536s%29_PQed_.djvu
from a reference in
http://www.onlyspacetime.com/Feast!
And thanks again to Shell's for the Reed paper
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#125
by
mwvp
on 30 Aug, 2016 05:34
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...
Wonder what else may be released after the 10 year NDA period expires?
Wonder what other DIY EmDrive experiments have also built wireless and battery powered rotary test rigs that have rotation?
For sure there will be no hat eating, at least not on my side.
This is my last post on this subject until the EW paper is available for download.
Aw, don't be that way. I believe, FWIW. The papers you posted were very interesting and appreciated, for me anyways.
When I first read Shawyer's released theory papers, I didn't get the equations at all. After a year researching waveguide propagation, dispersion, field theory, the vacuum, et. They make sense to me.
Then again, I was looking for it, since from the outset I considered radiation counter-propagating at the speed of light to be an absolute reference frame (evidenced by such things as the Sagnac effect, and particle de Broglie wavelength, velocity and inertia of every freek'in Fermion in the Universe) as described in a number of the references that have been sited here. Even Shawyer too.
Please post more, and more of your experiments and results, and stop feeding trolls that bite and make you run away crying
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#126
by
Chrochne
on 30 Aug, 2016 09:32
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Latest developments are reaching more news sites. Daily mail was first to publish the news. It seems they were following the NSF quite a lot.
I also spot few that were just utterly wrong....Once again refering to EmDrive as Warp Drive...
This one is ok.
goo.gl/ECPpDn
Also Hi to guys from Hacked news site as they are following us closely now.
Edit: Another article just went live - goo.gl/702HhN
This article is also well written. I am glad to see that so far less articles exagerate and more focus on facts.
Dr. Rodal is in spotlight
Also IBTimes spoke directly to Mr. Shawyer - I have that confirmed from good source.
"He is also actively working to test the technology out on unmanned aerial vehicles (UAV), in the hope of creating feasible flying cars."
Shawyer is now actively working on the second-generation EmDrive with an unnamed UK aerospace company and the new device is meant to be able to achieve tonnes of thrust (1T = 1,000kg), rather than just a few grams.
"We're trying to achieve thrust levels that go up by many orders of magnitude, where the q values of the cavities are between 1 x 10
9 and 5 x 10
4. Once you reach the levels of thrust we anticipate we will reach, you can apply it anywhere," he told IBTimes UK. "Essentially, anything that currently flies or drives or floats can use EmDrive technology."
Second Edit: Used link shortener on advice of Mr. Chris below.
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#127
by
Star One
on 30 Aug, 2016 15:30
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Due to its contentious nature I am guessing this paper is going to have had a lot of peer reviewers.
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#128
by
Tellmeagain
on 30 Aug, 2016 15:51
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May I have a question about NASA EW's plan? They once said that they were going to increase the force to 100mN, and only after that would they transfer the test apparatus to another NASA facility for validation. Given they now claimed 1mN/1KW in the paper that had just passed peer review, could we suppose that 100mN plan can not be achieved if the power is much less than 100KW so it is now abandoned? Note that 100KW is a lot of power, I suppose the frustum will be evaporated in seconds, and if not there is something seriously wrong.
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#129
by
JonB
on 30 Aug, 2016 16:03
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Whereas 100KW sounds like a lot of power. In the grand scheme it really isn't. We've created wind turbines and diesel generators that create more power than that. 1 mechanical horsepower is about 734 Watts, so a 100hp engine (like your car, except most cars produce more) creates 73,400 Watts of power.
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#130
by
Chris Bergin
on 30 Aug, 2016 16:22
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#131
by
Tellmeagain
on 30 Aug, 2016 16:26
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Whereas 100KW sounds like a lot of power. In the grand scheme it really isn't. We've created wind turbines and diesel generators that create more power than that. 1 mechanical horsepower is about 734 Watts, so a 100hp engine (like your car, except most cars produce more) creates 73,400 Watts of power.
Then think about heating 1kg of copper (the frustum) with that power.
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#132
by
chucknorris101
on 30 Aug, 2016 17:23
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Sorry if it has been asked already, but I didnt see it - now that we are in phase 2 of the waiting game, when will it show up on the preprint page or in the journal itself? Is there a typical timeline? Or are there edits/further things that could derail/delay this?
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#133
by
tchernik
on 30 Aug, 2016 17:31
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Sorry if it has been asked already, but I didnt see it - now that we are in phase 2 of the waiting game, when will it show up on the preprint page or in the journal itself? Is there a typical timeline? Or are there edits/further things that could derail/delay this?
The journal people is talking more about appears in a bi-monthly basis. The latest one is the September issue (with web content that is readable now), therefore the next one should be published in November (with web content probably available in October). This is the technical publication I have heard referred to this:
http://arc.aiaa.org/loi/jpphttp://arc.aiaa.org/page/jpp/mastheadThis is from an user in another forum, so please take it with a grain of salt. I'm not sure the currently peer-reviewed papers appear in the very next issue, though. Probably there's some queue of papers waiting to appear.
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#134
by
JonB
on 30 Aug, 2016 17:55
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Admittedly, I am not well versed in thermal dynamics. I'm not saying it isn't an issue for concern, but it isn't a deal-breaker. We are talking about dielectric heating as opposed to heating a series resistor. It's the difference between your oven's heating element and nuking something in the microwave, which is probably set to heat between 800 and 1000W. Granted you probably aren't putting anything conductive in your microwave, but I'm sure some sort of heat dissipation system will be used in the end to combat the thermal problems.
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#135
by
Bob Woods
on 30 Aug, 2016 18:06
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Admittedly, I am not well versed in thermal dynamics. I'm not saying it isn't an issue for concern, but it isn't a deal-breaker. We are talking about dielectric heating as opposed to heating a series resistor. It's the difference between your oven's heating element and nuking something in the microwave, which is probably set to heat between 800 and 1000W. Granted you probably aren't putting anything conductive in your microwave, but I'm sure some sort of heat dissipation system will be used in the end to combat the thermal problems.
NASA Eagleworks did some of their testing in a vacuum chamber to eliminate thermal lift as a contributor, and some of that information is in older threads. We'll have to wait to see the full details in the paper.
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#136
by
Flyby
on 30 Aug, 2016 18:22
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May I have a question about NASA EW's plan? They once said that they were going to increase the force to 100mN, and only after that would they transfer the test apparatus to another NASA facility for validation. Given they now claimed 1mN/1KW in the paper that had just passed peer review, could we suppose that 100mN plan can not be achieved if the power is much less than 100KW so it is now abandoned? Note that 100KW is a lot of power, I suppose the frustum will be evaporated in seconds, and if not there is something seriously wrong.
IIRC, the measured forces on the Eagleworks tests were in the order of 50-55-90 µN.... (see
http://emdrive.wiki/Experimental_Results)
So they had to achieve 100µN to get secondary testing, not 100mN.
There was never a mentioning of "force per watt" (N/kW), just force (N). It was all about the sensitivity of the force measurement instruments, not about the efficiency of the EMdrive...
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#137
by
Tellmeagain
on 30 Aug, 2016 18:30
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IIRC, the measured forces on the Eagleworks tests were in the order of 50-55-90 µN.... (see http://emdrive.wiki/Experimental_Results)
So they had to achieve 100µN to get secondary testing, not 100mN.
There was never a mentioning of "force per watt" (N/kW), just force (N). It was all about the sensitivity of the force measurement instruments, not about the efficiency of the EMdrive...
Ah, Thank you, I must have had a bad memory. 100uN was definitely more likely the goal.
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#138
by
johnatan warp drive
on 30 Aug, 2016 21:01
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Anyone know what would be the effect if the ends of Emdrive, instead of flat surfaces, were semi spherical ?
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#139
by
RotoSequence
on 30 Aug, 2016 22:03
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Anyone know what would be the effect if the ends of Emdrive, instead of flat surfaces, were semi spherical ?
The bandwidth of the frustum decreases while increasing the resonance within the narrower range (increased q-factor). In Q-factor dependent theories, this should increase the measured thrust for a given center frequency.
