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Author Topic: Magnetic braking of magnets sliding along a sloped aluminum surface  (Read 53501 times)

WilbyInebriated

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #60 on: May 22, 2009, 05:51:09 AM »
Yep, that's what I said all right.
And anybody can show you Meissner effect levitation and show the magnet rotating. Not too many have seen it spontaneously START rotating like in my video. I did not discover the effect; you will see that I cited references to peer-reviewed articles, when you learn to read. You r video is CLEARLY not demonstrating the effect I am showing and the maker of the video CLEARLY doesn't even know about it.
Stiffler is afraid of me, he would ban me instantly and you know it. Besides, I'm not interested. Now go away, this place was a lot more pleasant while you were gone.

it clearly spins. once he spins it with mr. hand. but the rest of the time you can see it spinning, the magnet has a chip in it.  get your eyes checked old man, or get a new monitor.
did i say you discovered the effect? are you just making assumptions again?

more like you're afraid of stiffler. stiffler can't ban you from making a youtube video 'proving' how he is conning everyone, and you know it...  ::)

i'm not going anywhere. this isn't your mommies house, you don't get things your way because someone is putting you to task.
« Last Edit: May 22, 2009, 06:28:43 AM by WilbyInebriated »

TinselKoala

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #61 on: May 22, 2009, 05:51:41 AM »
Stefan, can you get this monkey off my back, please?

TinselKoala

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #62 on: May 22, 2009, 05:52:54 AM »
it clearly spins. once he spins it with mr. hand. but the rest of the time you can see it spinning, the magnet has a chip in it.  get your eyes checked old man, or get a new monitor.

stiffler can't ban you from making a youtube video 'proving' how he is conning everyone, and you know it...  ::)

i'm not going anywhere. this isn't your mommies house, you don't get things your way because someone is putting you to task.

The spinning is no big deal, it's the spontaneous starting to spin, for the very last time, will you please learn to READ.

WilbyInebriated

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #63 on: May 22, 2009, 05:53:42 AM »
i guess i'm not 'contributing' in your definition of the word, which seems to be to rehash old news...

i didn't say jack. now you're just making shit up.
yes, i have it somewhere. lab notes.

the video was done by "Professor Tom H. Johansen in the Superconductor Laboratory at the University of Oslo".  why don't you write him and ask if him if he knows before you start making assumptions as usual. if YOU KNEW HOW TO READ i wouldn't have to be telling you that it was done by a professor...

LOL
now you're crying to stephan? this is better than mylow...

WilbyInebriated

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #64 on: May 22, 2009, 05:57:10 AM »
The spinning is no big deal, it's the spontaneous starting to spin, for the very last time, will you please learn to READ.

it spins spontaneously... for the very last time, watch the video old man or get some new googles...

BEP

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #65 on: May 22, 2009, 06:03:46 AM »
Are you aware of any books, papers, or websites that discuss this behavior?

Nothing on the web. I've only been using the web for such activities for about three years (still don't trust most web sources). It could be there buried in a thesis somewhere. I don't know.
Books? Yes. The first time I saw related issues was in a late 40's CQ or QST relating to antenna design difficulties when using Al instead of Cu. I remember reading about a maglev train that hit the rollers above a certain speed and all the brains freaked out with no answer. Don't remember the article but it was in "2000" (?) A former science magazine for the masses. The main thing I remember was my feeling - Yea DUH! what did you idiots think would happen?

My first experiments were with transformers. I was trying to see why the primary and secondary were out of phase by a 'none book' amount. Make an Al core then things really go wacky!
 
Quote
At the moment, I think this is the most rational explanation we have.

Not something said about a comment from me before. Make sure you are ready to withdraw that comment should the torches head your way  :)

Quote
But I still have some questions:

1) As TK mentioned, these speeds are far from relativistic. Why would the oppositional field created by the eddy current lead or lag the magnet?

2) Why would polarity make a difference (unless there is some external influence)?

Still wondering what TK's upsliding experiment will show us.

I have answers for you but I'll basque in your earlier comment about my statement for a while first....

Nah! that'll really throw the thread of course.
« Last Edit: May 22, 2009, 07:01:16 AM by BEP »

broli

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #66 on: May 22, 2009, 10:21:23 AM »
Due to the shit storm it's hard to get some constructive things out of this thread.

Has it been established that the flip is caused by some repulsion of the aluminum? This could lead to some interesting technical discoveries.

tournamentdan

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #67 on: May 22, 2009, 03:09:32 PM »
@tk what's with the rotation video? that's more old news you know...
but go on with your bad self. from your vid clip: "should i repeat it?" yeah yeah, you better. this is big news!!


oh goody, look there's a video from 2006... well that's that then, someone HAS done this before, there is video proof even.  ::)

http://www.youtube.com/watch?v=nWTSzBWEsms&feature=related
the rotation is obvious. no audio, sorry. the prof. demonstrating it isn't quite as interested in hearing himself talk as you are tk. he keeps messing with the magnet, but the rotation is there none the less.

so again, if you can't put two and two together and deduce what comes next or even be bothered to observe the experiment when shown to you in college, you aren't as creative, imaginative, deductive or logical as you think you are.

p.s. still waiting for your debunking of stiffler. you got 50 years of experience and scorched fingertips to boot according to your own claims, should be a walk in the park for you to show how stiffler is conning us all. it sure wouldn't cost you $900 and 80 hours of your time like this magnet stuff. oh yeah that's right your concentrating on the, how did you say it to me? "concentrating on the easy stuff: gravity wheels, magnet motors, and buoyancy drives (and you can see how hard it is even with these obvious losers)"
that's funny, that you like playing with these "obvious losers", so nice of you to say that about them too.

@ WilbyInebriated
I feel it is obvious that you have not had a real or a original thought ever in your life, because if you had you would know that cooling a material with liquid nitrogen would most likely make it a super conductor, which I would hope that most people on this thread would know that the reaction of a magnet to a super conductor, and the reaction of a moving magnet and aluminum or copper or brass ect.... is completely different. Or just maybe you have been stuck in your mom's basement for to long. ;)





TinselKoala

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #68 on: May 22, 2009, 03:18:48 PM »
Due to the shit storm it's hard to get some constructive things out of this thread.

Has it been established that the flip is caused by some repulsion of the aluminum? This could lead to some interesting technical discoveries.

Broli, in my tests I have tested 6061 aluminum, 7075 aluminum, copper busbar alloy, deoxygenated copper (vacuum copper), naval brass, leaded brass, copper busbar w/ thin silver electroplating, and al-clad.
The nature of the effect is the same in all cases, but the magnitude and the critical angles, as it were, are different, using the same magnets. Different magnets...I dunno. There are alot of variables.
One thing that I haven't tested is copperclad g10 circuit board material. That's today.
One thing that does seem to make a little difference is the cladding or plating.

broli

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #69 on: May 22, 2009, 04:09:55 PM »
Broli, in my tests I have tested 6061 aluminum, 7075 aluminum, copper busbar alloy, deoxygenated copper (vacuum copper), naval brass, leaded brass, copper busbar w/ thin silver electroplating, and al-clad.
The nature of the effect is the same in all cases, but the magnitude and the critical angles, as it were, are different, using the same magnets. Different magnets...I dunno. There are alot of variables.
One thing that I haven't tested is copperclad g10 circuit board material. That's today.
One thing that does seem to make a little difference is the cladding or plating.

Did you also test on thicknes? Maybe using some thin smooth aluminum cooking foil on some plywood.

Yucca

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #70 on: May 22, 2009, 05:37:19 PM »
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

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #71 on: May 23, 2009, 05:48:13 AM »


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  munch! Yep I said it, you munch on .
Lose the god complex and grow the fuck up. How old are you?

mikestocks2006

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #72 on: May 23, 2009, 03:39:34 PM »
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

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #73 on: May 23, 2009, 04:56:58 PM »
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

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Re: Magnetic braking of magnets sliding along a sloped aluminum surface
« Reply #74 on: May 23, 2009, 06:05:18 PM »
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.