Author Topic: EM Drive Developments - related to space flight applications - Thread 10  (Read 779665 times)

Online SeeShells

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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

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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.

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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.

Online SeeShells

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Tajmar's group.
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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.

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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

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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

Offline Bob012345

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I'm starting to notice the use of the pseudo word 'meh' here more often. Please, stop! Thanks.
« Last Edit: 02/14/2018 07:06 PM by Bob012345 »

Online SeeShells

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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

Offline Bob012345

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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!

Offline Monomorphic

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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.

« Last Edit: 02/14/2018 08:02 PM by Monomorphic »

Offline graybeardsyseng

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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
EMdrive - finally - microwaves are good for something other than heating ramen noodles and leftover pizza ;-)

Offline aero

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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/meh
While 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/Meh

I personally don't like the word "no" when people respond to me, but I am required to put up with it.
Retired, working interesting problems

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