This device is the real self-running overunity?

[markdansie]

Thank Scotty for your video and explanation
mark

[gauschor]

(edit: -  deleted previous)

Thanks for demonstration, scotty 

[gyulasun]

@Gyulasun, great info, thanks!  What got me excited was the thought that although there would be some magnetic braking, the magnet surrounded by aluminium might outperform normal bearings by a wide margin.  It is a revelation (to  me) their would be no physical contact-induced losses with this set-up.  I managed to cobble together a very crude version of the German video at one time and while greatly impressed with the result, but I still had some physical friction from the axle (as does the German) - I hoped the aluminium would eliminate this...

In fact, all the videos you listed have this 'flaw', the requirement for a physical anchor to stabilise the rotor in the magnetic field!  In the Youtube messages of the last video, the creator of the magnetic bearing stated that there is some theorem that suggests that this is mandatory.  It's something I intend to experiment with nonetheless...

Hi Sprocket,

It is the Earnshaw theorem and it is not written in stone...  see the bottom part of this link on the Exceptions / Rotation: http://www.xs4all.nl/~johanw/PhysFAQ/General/Levitation/levitation.html

Also have a look at this video and see how stable the horizontal shaft rotates over 10000 RPM: http://www.youtube.com/watch?v=-n8Z_tyzda4
He speaks Spanish but there are English subtitles in the video. It is worth watching his earlier videos too.  I think the mechanical symmetry of the rotor is also of importance for minimizing instability during rotation.

I think you could make the shaft vertical by using four more mirror imaged ring magnets like the ones under the shaft as shown and at the shaft's bottom end two more repelling rings for the support of the total weight of the rotor.

rgds, Gyula

EDIT: here is another magnetically 'suspended' rotor, see the instability at startup: http://www.youtube.com/watch?v=vLbxFdQDLqI

[gyulasun]

Hi again.
Here is a clip I made.
I'll do one more as well.
@Gyula, I gave you a mention too. 
http://www.youtube.com/watch?v=WdesjiXt_Ig
Scotty.

Hi Scotty,

It very kind of you, thanks!  Nice video and hopefully we learn something useful from all the efforts made on this setup in this thread, either pro or con.

Cheers,  Gyula

[Aka]

Hi again.
Here is a clip I made.
I'll do one more as well.
@Gyula, I gave you a mention too. 
http://www.youtube.com/watch?v=WdesjiXt_Ig
Scotty.

thanks for posting the demo I wanted to see how you had it set up

could you try passing a small magnet (attracting) over the half of the rotating speaker magnet (quite close to the edge)...

my only speaker magnet is not north/south so I cant test that other than with individual magnets all north stuck on a rotor (which do rotate)

ps. your second video link shows the first video I had to view your username to find the new vid