Author Topic: EMDrive Experimental Observations Thread  (Read 2507 times)

Offline SteveD

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EMDrive Experimental Observations Thread
« on: 11/15/2015 03:21 am »
Prior to creating this forum, it seemed like experimental data about the EMDrive tended to get lost in the megathreads.  Here are some points that I think might be of interest to new readers.

Rotary Table Test by Shawyer (Drives Inventor): http://emdrive.com/dynamictests.html

The Hackaday Mini-EMDrive team thinks they might have found evidence of something exiting the drive counter to the direction of proposed movement.  https://hackaday.io/project/5596-em-drive/log/26824-juday-white-experiment
 
MEEP simulations show what appears to be some kind of movement of EM waves in the frustum in the proposed direction of travel in one of the proposed test articles (not the one in either of the above tests).  http://forum.nasaspaceflight.com/index.php?topic=38577.msg1446072#msg1446072

There seems to be Poynting vectors in the simulated test article in the direction of movement.  http://imgur.com/C82tJXx

Current results seem the be in line with the Shawyer/TheTraveller spreadsheet available here: http://emdrive.wiki/Useful_EMDrive_Design_and_Test_Tools.  (As a word of advice, if you're going to try a superconducting cavity I would suggest using a material that allows its resistance to be slowly dropped to make sure that there isn't an optimal Q).

A list of results to date can be found here: http://emdrive.wiki/Experimental_Results.  It should be noted that several engineers testing the drive on a DIY basis have reported positive results.     

A conference paper on tests of an EMDrive at the University of Dresden (not a DIY test) can be found here: http://arc.aiaa.org/doi/abs/10.2514/6.2015-4083 (They think they might have seen thrust in a vacuum but are not going to commit to anything until they can poke a drive with a stick a couple hundred more times.)

The results of RFMWGuys first run can be found in an, unpublished, paper available here: http://forum.nasaspaceflight.com/index.php?topic=38203.msg1432674#msg1432674 

Data and results from an EMDrive entered in South Africa's national Science Fair competition can be found here: https://www.reddit.com/r/EmDrive/comments/3ne6jq/thrust_detected_final_report_emdrive_build_update/
« Last Edit: 11/15/2015 03:29 am by SteveD »

Offline jnet

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Re: EMDrive Experimental Observations Thread
« Reply #1 on: 11/15/2015 02:22 pm »
back in the 1950-1960, even it had such a direction - devices, microwave power meters based panderomotoriki - "curtain" of quartz, which is "deflected" flow microwave. It is now accepted calorimeter (on the heating load) method of measuring the power, and then - even appliances are designed with shutters. Everything new is well forgotten old. Let's just say it is necessary to pipe which receives the microwave radiation, and cover the quartz rod will become tangible.
There is no violation of the fundamental laws .. just pull an abnormally high for pandemotoriki's all ..
« Last Edit: 11/15/2015 02:22 pm by jnet »

Offline SteveD

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Re: EMDrive Experimental Observations Thread
« Reply #2 on: 11/15/2015 06:20 pm »
back in the 1950-1960, even it had such a direction - devices, microwave power meters based panderomotoriki - "curtain" of quartz, which is "deflected" flow microwave. It is now accepted calorimeter (on the heating load) method of measuring the power, and then - even appliances are designed with shutters. Everything new is well forgotten old. Let's just say it is necessary to pipe which receives the microwave radiation, and cover the quartz rod will become tangible.
There is no violation of the fundamental laws .. just pull an abnormally high for pandemotoriki's all ..

I'm not really able to follow this.  Are you saying that this effect has been documented in the past (possibly in Russian language literature)?  Can you provide a link or reference to the papers in question?

Offline Ayreos

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Re: EMDrive Experimental Observations Thread
« Reply #3 on: 11/20/2015 10:15 am »
I'm not really able to follow this.  Are you saying that this effect has been documented in the past (possibly in Russian language literature)?  Can you provide a link or reference to the papers in question?

As far as i understand he means to say the EMDrive motion is of this type: https://en.wikipedia.org/wiki/Ponderomotive_force

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