Directional force measured

Good news for EMDrive V3: Tests confirm directional force :)

I got the thermal issue under control and was able to reproduce several tests in both directions of the cavity with corresponding results.
It´s still not a definite proof - but reproducible positive results show at what to take a closer look. The magnifying glass is on the right spot so to speak.
I will run several more tests to be sure these were not only accidental events.

The graph shows the angle of the line between the two LEDs on the swimming platform and the video-Y-axis.

The former promising tests were disturbed by thermal issues. There are about 2 Watts of power dissipated into heat by the power amplifier, so during ON/OFF cycles there was a rotation of the platform noticable which is about six times greater than the signal peak shown here.
In the recent tests, I sweep in a small frequency range 23.8-24.2 GHz over seven hours. while keeping the temperature constant.
I will publish the recent results later, so you´ll see that the warm-up phase takes about one hour with a constant shift of the rotation angle - until the platform becomes stable as soon as the temperature has reached its final peak.

There is always an oscillation of the platform with very low frequency (one period every few minutes). That´s the reason the tests have to be made so long.
I got rid of 75% of the noise by putting a box around the setup, so now if the peaks you see above will appear in that manner several times more it will look good for the BabyEMdrive.

Discussions

willemstaal wrote 03/21/2016 at 11:32

[/img] http://i65.tinypic.com/16apggl.png[/img] here is the first drawing of the rf antenna this must be connected to the rf joints and can be stacked in the frustrum. (you can bend it from copper installation wire or etch it on printed cirquit board)

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willemstaal wrote 03/16/2016 at 13:27

Im working on a stacked version of a appolonian gasket shaped design to place inside the frustrum where the rf input iis attachted to. Of course the numbers of iterations will be limited, so are the numbers of gaskets in the frustrum.. I see if i can render this in 3d Studio.. Dunno if any object placed inside the frustrum is affecting the results..

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willemstaal wrote 03/16/2016 at 09:12

Thanks, attiladtoth. As the frustrum is a enclosed system i need to reduce the amount of iterations dramatically. maybe we need to tacle the RF transmitter unit in stead of the frustrum..

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pomezi wrote 03/14/2016 at 16:27

Paul,

Have you done any statistical analysis to determine whether the pattern is above what one would expect from random chance and if so, what is the statistical significance?

How do you plan to "calibrate" the test to determine what level of force is being produced by the test article (i.e how many micronewtons (µN) of force is being produced)?

Thanks,

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Paul Kocyla wrote 03/14/2016 at 17:37

I don´t know yet. I have no device to measure these tiny forces qualitatively.
But I´m working on the statistical significance - makeing more and more tests.

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willemstaal wrote 03/14/2016 at 12:31

Good job. Considering you try to achieve movement result with a very low power RF signal.

Maybe there is the catch.

In the original setup of the Roger Shawyer EM drive they use a hefty Microwave transmitter.

The other day my smartphone smashed on the floor in pieces. (grumble) So i examine all the parts in this device. (i was always puzzled how they achieve to build a reception antenna into these little devices)

And i found out that the antenna in fact is a fractal unit!

That gives me a another idea; is it possible to translate the shape of the EM frustrum into a fractal design? Maybe this is enoegh to boost the effect, as i think a fractal antenna has a great effect on reception, so it must have effect on transmitting as well (if you do the math right)

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Paul Kocyla wrote 03/14/2016 at 17:36

Possible. How would a fractal cavity look like? I am lacking of theroy about that. The classic EMDrive cavity is derived from a well known waveguide theory.
The fractal cavity is a good idea to drive simulations with. If someone makes a groundbreaking simulation, I´ll try to implement it.

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attiladtoth wrote 03/14/2016 at 18:36

Maybe this might help:
www.andrewhazelden.com/files/2011/February/paul-416-report.pdf

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willemstaal wrote 03/15/2016 at 14:53

I forwarded this idea to Nasa as well, as they have experiences with all types of transmitters. You never know, they might cook something up!

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Tuning noise away

Going 2016HackadayPrize

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