Magnetic braking of magnets sliding along a sloped aluminum surface

[Yucca]

Well, as I see it the repulsion is a consequence of the whole Lenz/eddy thing. I mean, moving magnet induces circular currents in the conductor, orthogonal to the motion of the magnet. The current curls orthogonally to the field of the magnet.  Barring relativistic effects, the motion of the magnet should not lead or lag the current circles--disk really, I suppose. The circulating current is accompanied by its own orthogonal magnetic field which is in opposition to the field of the magnet. It is the resistance to the current in the current disk in the slide material that produces the drag force, and it is the repulsion of that current's mag field to the magnet's field that lifts the magnet (or conversely the conductor).
All that seems well understood, I think. And it would seem that the only way to separate the forces of drag and lift would be, well, to get rid of the electrical resistance in the disk. I wonder how we could do that...No, wait, I know...

But what I do not know is why the effect we are talking about in this thread is asymmetric WRT polarity of the magnet. Is that in Wilby's or Abba's posts? Because if it is, I don't see it.
http://www.youtube.com/watch?v=JRby1Wilv-Q

Hmm, superconductors, roll on room temp!

I'm not sure about the asymmetry. But some chap (I forget his name, he knew HJ) a while back made a 3d map by scanning a hall probe around a cylinder mag and graphing single flux level contour lines on a PC using 3d graphics, the resulting function looked like a tornado turning back on itself, it looked like the number of overall flux lines of each pole was equal, but the spread and shape of lines emanating from each pole was quite different. Maybe this is part of the puzzle?

[tournamentdan]

nice of you to go off all half cocked though... i won't expect a public mea culpa, i doubt you have the balls to man up and do so.

You know what, you are right I did not look at his vid, and so for that I am sorry.
But that still does not change that fact that you are a cock munch! Yep I said it, you munch on cock.
Lose the god complex and grow the fuck up. How old are you?

[mikestocks2006]

Any thoughts on this earlier post/video?

"Now regarding the repulsion effect, at sufficient relative speed, it does seem to work.
This maybe of interest as a demonstration of the repulsion effect, at speeds of up to 24 mph maybe even less.
http://www.youtube.com/watch?v=glCNP6qH_Dc

TK, as the mags accelerate towards the lower end of the Al or Copper surface, is there an estimate on how fast they are traveling at the time they start moving away/flipping??

Thanks
Mike"

Also in that video, the orientation of the cylindrical mag is  indicating a N-S direction parallel to the copper cylinder axis of rotation.
Interesting stuff.

[lostcauses10x]

Hmm some stick talk (turf talk) seems to have derailed a observation and provided visual  proof of such, therefore damaging the discussion of such.

Oh well if I get time I will have to do a post later on this. It is fun at least.

[0c]

Just a weird thought:

Attach an aluminum disc to the bottom of the magnet and slide it down the aluminum ramp.

The aluminum disc will remain static WRT the magnet. The magnet will induce Foucault (eddy) currents and an oppositional magnetic field in the ramp. The moving oppositional field in the ramp will induce secondary eddies and more oppositional magnetic forces into the aluminum disc.

... or maybe not.