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#3020
by
SeeShells
on 14 Feb, 2018 16:45
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Thank you for your presentation as well Jose'. I enjoyed it... lots. Great points to ponder and great questions to answer.
3, 4 or 5 months meh, it's just inquiring minds want to know. Thanks for correcting that early morning before coffee boo boo.
My Very Best,
Shell
...
It's been 5 months since the Navel Research Labs reported what they were doing. I'd be interested on hearing anything or a update.
...
Thank you SeeShells for your excellent post. Regarding the Naval Research Laboratory (NRL) presentation, I count 3 months and 12 days since the presentation on Thursday, November 2nd, 2017. I have not seen an update yet from NRL or from TUDresden. Both said that they were going to proceed very methodically and systematically, so it may take a while. I expect Tajmar's TUDresden group to perhaps present at the Aerospace and Defense conference in Sevilla http://sevilla.bciaerospace.com/en/ May 15 to 18, 2018.
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#3021
by
SeeShells
on 14 Feb, 2018 16:57
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...
Tajmar's group.
...
2. No thrusts reported, said it was a compass needle. It takes a DC component to make a north and south pole, where was their DC component in their rig??
DC in grounding loops may be a direction to investigate. Also there are DC inside of amplifiers and other components.
3. Almost of their testing was done at a tiny 2 watts of RF. We have not seen any reported thrusts at 2 watts from anyone.
EW reported 2.6W and 55.4uN, http://www.libertariannews.org/wp-content/uploads/2014/07/AnomalousThrustProductionFromanRFTestDevice-BradyEtAl.pdf, page 17
...
Thanks PN.
Paul said that he was manually tuning in these runs and it was very tough to keep in the TE012 mode and get repeatable data.
Yes, I'd be looking at any DC in ground loops but that wasn't covered and it should have been.
My Very Best,
Shell
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#3022
by
Bob012345
on 14 Feb, 2018 18:46
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I'm starting to notice the use of the pseudo word 'meh' here more often. Please, stop! Thanks.
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#3023
by
SeeShells
on 14 Feb, 2018 18:52
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I starting to notice the use of the pseudo word 'meh' here more often. Please, stop! Thanks.
Not a problem Bob, sorry it bothered you.
Shell
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#3024
by
Bob012345
on 14 Feb, 2018 19:29
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I starting to notice the use of the pseudo word 'meh' here more often. Please, stop! Thanks.
Not a problem Bob, sorry it bothered you.
Shell
Now I feel guilty
as it wasn't meant to target any one specifically. But thanks!
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#3025
by
Monomorphic
on 14 Feb, 2018 19:39
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DC in grounding loops may be a direction to investigate. Also there are DC inside of amplifiers and other components.
Tajmar says at 33:40 of his Aerospace presentation that they provide the thrust balance with 28VDC. Components such as main amplifier, power detectors, stepper motors, ADC, etc. are all powered via a voltage converter that can supply 5VDC, 12VDC, or whatever else required from the 28VDC mains.
https://www.youtube.com/watch?v=36Hpgxb9MdU?t=2018I use a 12VDC lipo for the mains so I don't have to worry with liquid contacts. I do have a 5VDC converter for the solid state relay. Everything else is 12VDC.
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#3026
by
graybeardsyseng
on 16 Feb, 2018 13:21
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DC in grounding loops may be a direction to investigate. Also there are DC inside of amplifiers and other components.
Tajmar says at 33:40 of his Aerospace presentation that they provide the thrust balance with 28VDC. Components such as main amplifier, power detectors, stepper motors, ADC, etc. are all powered via a voltage converter that can supply 5VDC, 12VDC, or whatever else required from the 28VDC mains.
https://www.youtube.com/watch?v=36Hpgxb9MdU?t=2018
I use a 12VDC lipo for the mains so I don't have to worry with liquid contacts. I do have a 5VDC converter for the solid state relay. Everything else is 12VDC.
Jamie,
I really like your approach very much; in fact I am copying a lot LOL.
Everyone,
Lipo gives a lot of options due to excellent energy density to weight or volume ratio. I am going a very similar approach on my buildup except I am going for a "24 Vdc" system and using converters as needed for 12Vdc and 5 vdc. I am using a 6S1P configuration to produce 25.2 Vdc when fully changed and 22.2 at "nominal" or half charged state.
I can go to 2P or 3P as needed for max current needed. I have been using these types (LIPO) for several years now and I strongly recommend studying reviews of vendors - don't try to go overly cheap. A discharge fire or a popping a cell by incorrectly charging are no fun.
LiPo's are great batteries but I would caution anyone considering them for an EMdrive build to brush up on their individual characteriestics. They have "interesting' requirements which MUST be met. They must be charged and
discharged properly. In addition be careful to understand and follow the max discharge rate limitations. Reading some posts here is NOT sufficient knowledge. Google or your favorite search engine is your friend here. Here is a starting point - and Instructables article with a lot of good info -
http://www.instructables.com/id/Lithium-Polymer-Etiquette/Herman
graybeardsyseng
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#3027
by
aero
on 19 Feb, 2018 00:28
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I wouldn't think of straying off-topic ... meh
I starting to notice the use of the pseudo word 'meh' here more often. Please, stop! Thanks.
Not a problem Bob, sorry it bothered you.
Shell
Now I feel guilty as it wasn't meant to target any one specifically. But thanks!
But "meh" is defined here:
https://en.oxforddictionaries.com/definition/mehWhile it may not be a perfectly good word, it is a good word. Basically a verbal shrug.
It has other uses, see
https://en.wikipedia.org/wiki/MehI personally don't like the word "no" when people respond to me, but I am required to put up with it.
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#3028
by
Mulletron
on 25 Feb, 2018 01:56
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At 14:05, there's an almost perfect representation of what a mechanical version of an EMdrive can be represented as, the big difference is, to be truly an accurate mechanical analogue, I think the length of the rods should become shorter along the length.
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#3029
by
oyzw
on 25 Feb, 2018 02:02
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Hello, can you take a screenshot? I can't see video. Thank you very much
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#3030
by
JonathanD
on 25 Feb, 2018 14:21
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Hello, can you take a screenshot? I can't see video. Thank you very much
I don't think the screenshot will be that helpful but I've attached it. The presenter was demonstrating a standing wave pattern as a result of wave reflection caused my lack of impedance matching of the load and transmission. At least, that's what I got out of it #notaphysicist
Title of the video is "AT&T Archives: Similiarities of Wave Behavior (Bonus Edition)" if you can maybe find it elsewhere.
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#3031
by
flux_capacitor
on 25 Feb, 2018 15:24
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Hello, can you take a screenshot? I can't see video. Thank you very much
oyzw, is there an online video service similar to YouTube available in China? If so we could post the video there.
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#3032
by
PotomacNeuron
on 25 Feb, 2018 15:36
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Hello, can you take a screenshot? I can't see video. Thank you very much
oyzw, is there an online video service similar to YouTube available in China? If so we could post the video there.
Nowadays almost every forum in China requires bundling a cell phone to obtain the privilege to post. I lost the right to post on at least 3 forums I frequent. No, your US cell phone does not work.
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#3033
by
SeeShells
on 25 Feb, 2018 18:00
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Thought I remembered this page and how it looked like this video.
Observe the wave actions through the neck of the bottle, it acts like impedance matching tapered section in the video you linked.
Vibrational Behavior of an Empty Beer Bottle
http://www.acs.psu.edu/drussell/Demos/BeerBottle/beerbottle.htmlShell
At 14:05, there's an almost perfect representation of what a mechanical version of an EMdrive can be represented as, the big difference is, to be truly an accurate mechanical analogue, I think the length of the rods should become shorter along the length.
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#3034
by
flux_capacitor
on 25 Feb, 2018 19:21
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Hello, can you take a screenshot? I can't see video. Thank you very much
oyzw, is there an online video service similar to YouTube available in China? If so we could post the video there.
Nowadays almost every forum in China requires bundling a cell phone to obtain the privilege to post. I lost the right to post on at least 3 forums I frequent. No, your US cell phone does not work.
It seems pretty insane, but I was saying another thing: the possibility to post the video on some YouTube-like website that would be uncensored in China, therefore accessible to oyzw (not to post ourselves on a Chinese forum).
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#3035
by
oyzw
on 25 Feb, 2018 23:33
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Hello, can you take a screenshot? I can't see video. Thank you very much
oyzw, is there an online video service similar to YouTube available in China? If so we could post the video there.
Yes! For example：
http://www.youku.com/,
https://www.bilibili.com/
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#3036
by
oyzw
on 25 Feb, 2018 23:35
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Hello, can you take a screenshot? I can't see video. Thank you very much
oyzw, is there an online video service similar to YouTube available in China? If so we could post the video there.
Nowadays almost every forum in China requires bundling a cell phone to obtain the privilege to post. I lost the right to post on at least 3 forums I frequent. No, your US cell phone does not work.
We are also frustrated and helpless.
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#3037
by
flux_capacitor
on 26 Feb, 2018 18:27
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#3038
by
oyzw
on 26 Feb, 2018 23:33
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Hello, can you take a screenshot? I can't see video. Thank you very much
oyzw, is there an online video service similar to YouTube available in China? If so we could post the video there.
Yes! For example：http://www.youku.com/, https://www.bilibili.com/
oyzw, I tried to republish the video on Youku. It was quite difficult to register and send the complete file due language-specific warnings and multiple upload failures, and although I have never seen so many ads on any other video-sharing website, you should be able to watch it there:
http://v.youku.com/v_show/id_XMzQyNTgyNTk3Ng==.html?spm=a2h3j.8428770.3416059.1
Thank you very much for your help. I can see this video.
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#3039
by
spupeng7
on 27 Feb, 2018 04:31
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Magnetic monopoles
I thought I already posted this, but probably I didn't
http://www.sciencealert.com/our-quest-to-find-the-truest-north-in-the-universe-just-took-an-unexpected-turn
given the latest discussions about monopoles, I suppose the above (and the original paper linked at bottom) may be of interest
I think what happened is a lot of people were posting stuff in the old thread after Mr Bergin posted the closing and requesting all further posts to be in the new thread. thus a few monopole related posts got banished into the aether -a shame because they were good though they were tangential to the topic.
Is there any chance of reviving the discussion of explanations for emdrive thrust, should it prove true?
This monopole discussion was right on topic, there is a huge difference between remote interaction in a universe where magnetic monopoles exist and one where the distribution of charges explains all electromagnetic action. Explanations for emdrive thrust in these two universes would be completely different.
as it wasn't meant to target any one specifically. But thanks!