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[Bruce_TPU]

Since Alsetalokin mentioned that exact distance of the stator magnet to the rotor is quite important, I wonder how important slight differences between the individual rotor magnets strenghts are.
But how to determine the differences in the strength between the used rotor magnets?

And even more to the point: differences between the rated strengths and sizes of the magnets?  Most of the rigs I've read about seem to be using N42 magnets for both stators and rotor whereas, reportedly, Al used N35 magnets for his rotor mags.

You know, as cheap as the magnets are, it might not hurt to have an additional set of N35's to test with.  If someone could source it here in the U.S. 

No reason I can see, to take a chance of missing it.  We try with the N42's and if after tuning, testing, etc, we can not replicate, we try the N35's.  Just my thought for the day.   

This is so important, we can not leave any stone unturned.  IMHO

Cheers,
Bruce

[robbie47]

I'm new at this so is this a good place to post a new video?

Sure, we're all curious.

[lumen]

I think the video may be too big (140meg), it reset my connection.

[Omnibus]

@All,

I want to report that the initial experiments are very promising. After the initial spin a definite acceleration is observed which so far still cannot be sustained as long as @alsetalonkin's but the effect is definitely there. I will restrain at this point from posting a video or quantitative results which I will present to you later.

[Dyamios]

I think the video may be too big (140meg), it reset my connection.

You might want to try uploading it to google video or youtube; both services will automatically recompress the videos.

[geodan]

@All,

I want to report that the initial experiments are very promising. After the initial spin a definite acceleration is observed which so far still cannot be sustained as long as @alsetalonkin's but the effect is definitely there. I will restrain at this point from posting a video or quantitative results which I will present to you later.

How about just a peek??

[Omnibus]

@geodan,

Wanna work a bit first before posting results.

[m0thman]

@geodan,

Wanna work a bit first before posting results.

I think we're just a bit hungry to see some success here!  I know I'd be giving this a go if I had the cash, tools and a workshop.  Being self employed I have plenty of time but no money :-(

[geodan]

@geodan,

Wanna work a bit first before posting results.

I can certainly understand that, we'll be here when you're ready.

oh and ahh..

WOOOHOOOO! Congratulations!!

[LarryC]

@m0thman,

Same situation here, this is more stressful than watching LSU football this season.

[jcims]

@m0thman,

Same situation here, this is more stressful than watching LSU football this season.

Try being a buckeye fan sometime...lol

[MeggerMan]

Hi Bill,
I sort of recognise your handle from the Joe Cell days, did you have a running Joe Cell in your car at some stage?

Hi Jason,
Very sorry, I have to disagree about placing a stronger magnet further away.  If the attack angle between the rotor and stator are critical then it may be that N35 are just right and that N42 or above are just too powerful.
 http://www.athenapolis.com/NN_MotorintheMagnet.htm
 http://www.athenapolis.com/NN_FindingtheMotor.htm

According to the tests that Nick Nelson has done: "each pole of a magnet consists of 3 or 4 separate and distinct magnetic spin zones,depending on the pole".
So if the motor is reliant on these spin zones then getting the magnet of the correct strength and dimension may turn out to be critical.
I am even wondering if the stator would benefit from a slanted angle to the rotor (45 deg. in both planes).
I am keen to try out his ring magnet idea to see if will rotate by hand then try and make up a simple spindle to allow it to rotate on its own.
If this idea turns out to hold water then it certainly opens up a whole raft of possibilities for the WhipMag and the TPU.
The science of magnetic spin zones, sounds catchy.   

Regards
Rob

[sterlinga]

Finally got some shop time. I know it is not an exact replication. [...]. I also found it spins better one direction (CCW) then the other (CW). Not sure why.. Lots of playing to do before I get more shop time. At least it is a start..

I posted a feature page on this:

Hydrocontro's Replication of the MPMM magnet motor - User "hydrocontro" proposes that this counter-rotating stator design accomplishes what he observed in another magnet motor design he built which only worked if the stator were held by hand.  He also observes that his MPMM replica "spins better one direction (CCW) then the other (CW)".
http://peswiki.com/index.php/OS:MPMM:Replications:hydrocontro

It would be nice if we had more info
- how fast did it run?
- how long?
- did it accellerate
- video

Thanks

Sterling

[Rosphere]

Since Alsetalokin mentioned that exact distance of the stator magnet to the rotor is quite important, I wonder how important slight differences between the individual rotor magnets strenghts are.
But how to determine the differences in the strength between the used rotor magnets?

...

...

Well, if you have more magnets on hand than the number that you plan to use and you want to select a smaller group with the least amount of difference between them, then I suggest using a compass in a manner similar to the way that I used one below.

These are 1/2" 'Home Depot' disc magnets.  The compass would normally point vertical, towards the top of the images.  The North face of all magnets point towards the compass.

One lone magnet at the bottom, (not pictured,) will balance the Earths field at about 4_25/32", center-to-center.  When the compass points East, or West, all the North fields are in balance, (remembering the Earths constant 1T from the top.)

As expected, the strength doubles with ever smaller increments moving towards the magnet.  At 4T I had a hard time preventing the influence of the compass needle from rotating the magnet.

All magnets are freely resting on the surface.  The black paper-tape is there just to keep them from rolling away before I could snap a photo.

(http://www.overunity.com/index.php?action=dlattach;topic=1872.0;attach=9436;image)
http://www.overunity.com/index.php/topic,1872.msg33963.html#msg33963

There is no need to go to all that trouble.  All you need to do is slowly approach the compass directly from the South with the North attracting side of the magnet until the compass starts to spin towards the magnet.  Back it off even slower until the compass needle is 90 degrees, (pointing East or West,) and mark the position of the magnet.  Repeat for all magnets and select the number that you need that have the least amount of deviation from each other.  Good luck.

Anyone trying this suggested method, please let me know if it is useful, or not.  Thank you.

(NOTE: If you are extremely anal retentive, then you can check both sides of each magnet by also approaching the compass directly from the North with the South attracting side of the magnet.  I wonder if this will always turn out to be redundant.)

[sterlinga]

@All,

I want to report that the initial experiments are very promising. After the initial spin a definite acceleration is observed which so far still cannot be sustained as long as @alsetalonkin's but the effect is definitely there. I will restrain at this point from posting a video or quantitative results which I will present to you later.

Posted a feature page here:

Replications > Omnibus' Replication of the MPMM - "After the initial spin, a definite acceleration is observed, which so far still cannot be sustained as long as alsetalonkin's but the effect is definitely there." (Jan. 16, 2008)
http://peswiki.com/index.php/OS:MPMM:Replications:omnibus

Photo, video, additional info would be nice, so I could feature this in my news.