Tri-Force Magnets - Finally shown to be OU?

[klicUK]

Cheers for the info Yada.

I guess I will have to get myself to the local toy shop.

Yipee 

I haven't been in a toy shop for ages. I can't wait !!

The magnet sets are very inexpensive, but be cautioned that you will become addicted

Let us know when you replicate the "magnetic contraption".

Cheers

Yada..
.

When I first saw this I suspected the reason for the lengthy spin was that there was very little friction between the two bearings that support the spinner. When I built it though, I found that there are certain configurations that give quite lengthy spin times, and there is clearly a "gate" effect involved.

My control arrangement is where the upper bearing of the double tetrahedron is connected with four bar magnets each with the same pole facing upwards. The second bearing that is used to suspend the double tetrahedron is then easily attracted to this upper bearing. There were no other magnets on top of the suspension bearing. Holding the suspension bearing in my fingers, I then started the device with a slight push.

Even a small push will rotate the "spinner" for quite some time - easily as long as is shown in the video. Changing the arrangement of magnets and trying to copy the shape of the upper part of the device does yield varying results, but the length of spin time is still dependent on the initial push that I give it, and this is an arbitrary force that I apply with my hand - not very scientific.

I have noticed that small oscillations from the initial push start seem to facilitate the rotation in certain arrangements,  but it is difficult to know whether or not the device runs longer than the control arrangement because the starting force is always unknown.

I'll try and rig something up to start it with a reasonably uniform force, and then record spin times.

Easy to build - just keep playing with configurations. I don't think we'll find OU though.

klicuk

[Rusty_Springs]

Hi All
If you go to http://tech.groups.yahoo.com/group/minatowheel/ you will see that I posted a video of the same setup of the square hanging by magnets and steelballs, I talked about it there ages ago and said when I discovered it it showed me there was hope but theres not enough force there to do work, I even told everyone how to set it up its funny now I'm seeing my designs pop up everywhere I even saw my changing fields at a site, it so cool seeing my designs around the net
Take Care All
Graham

[Rusty_Springs]

Hi Yada
First with that square or diamond setup its north south north south around you can have it as a diamond or square it doesn't make that much differance.
As for my Trigate motor setup all the Trigates are connected in a loop taking a few out to give you an airgap they all must be setup so they attract in and repel out.
Trigates in a V do join and keep the rotation going, oh and the reason  CLaNZeRS didn't work was he had the Trigate closed with the steelballs and magnet across the top to get it to attract in you have to remove the magnet and steelballs across the top.
Take Care Yada and all
Graham

[Rusty_Springs]

Hi All
Another reason CLaNZeRS didn't work is the airgap is to big and I have no proof of this like the V's joined I can make a video to show you but I think if the rotor magnet is rolling it works better as I said I have no proof of this I just feel it.
Take Care All
Graham

[Yadaraf]

Hi Yada
First with that square or diamond setup its north south north south around you can have it as a diamond or square it doesn't make that much differance.
As for my Trigate motor setup all the Trigates are connected in a loop taking a few out to give you an airgap they all must be setup so they attract in and repel out.
Trigates in a V do join and keep the rotation going, oh and the reason  CLaNZeRS didn't work was he had the Trigate closed with the steelballs and magnet across the top to get it to attract in you have to remove the magnet and steelballs across the top.
Take Care Yada and all
Graham

Rusty_Springs

Thanks Graham. 

As I understand it now, there is NOT a pattern of 3-gap-2, and what you did was layout a bunch of independent "V" gates in a circle (i.e. NO connecting balls), and then remove a couple of gates to create a gap.  Is this correct?

Thanks for pointing out about the lack of connecting steel balls, since I am so used to using them I completely missed this in your drawing.

Cheers

Yada..
.