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Author Topic: Howard Johnson linear track accelerator video  (Read 34354 times)

corona

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Re: Howard Johnason linear track accelerator video
« Reply #15 on: March 30, 2009, 02:31:19 AM »
Or you may be able to use some flexible strip magnet to make the ring one, depending on the strength required. You would also have to make sure the strip is a single pole strip and not an alternating pole strip, I'm under the impression that you can get it in both types.

Andrew
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hansvonlieven

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Re: Howard Johnason linear track accelerator video
« Reply #16 on: March 30, 2009, 02:38:47 AM »
@ corona,

I think you are right. That is probably exactly what Howard did. He seems to have cut pieces out of sheets for some of his other designs.

Hans von Lieven
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broli

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Re: Howard Johnason linear track accelerator video
« Reply #17 on: March 31, 2009, 01:13:15 AM »
I believe I found a method to make such a gate with my own reasoning. All you need are two ring magnets and shielding. Maybe it'll work without shielding but in pure theory it won't. We all know that theory can be completely wrong sometimes  ;D. If you have some ring magnets you should try it out. I did a basic experiment and this setup indeed pulls the magnet in and can shoot it out if it passes a sticky point. But the shielding should kill that sticky point.
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hansvonlieven

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Re: Howard Johnason linear track accelerator video
« Reply #18 on: March 31, 2009, 01:19:11 AM »
@ broli,

I think Howard used his rubber ringmagnet as a sort of shielding.

Hans von Lieven
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broli

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Re: Howard Johnason linear track accelerator video
« Reply #19 on: March 31, 2009, 01:31:52 AM »
Whatever he used the design I proposed should be investigated.

Does someone have some big ring magnets laying around and maybe some iron tubing that can fit inside and acts as the shield?
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hansvonlieven

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Re: Howard Johnason linear track accelerator video
« Reply #20 on: March 31, 2009, 01:45:16 AM »
@ broli,

Can you first explain just how you are going to create a magnet with one pole on both faces and the opposing pole in the centre? Are you going to force the magnets together and bond them with glue?

Hans von Lieven
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broli

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Re: Howard Johnason linear track accelerator video
« Reply #21 on: March 31, 2009, 01:46:38 AM »
Quote from: hansvonlieven on March 31, 2009, 01:45:16 AM
@ broli,

Can you first explain just how you are going to create a magnet with one pole on both faces and the opposing pole in the centre?

Hans von Lieven

Lol, those are two ring magnets faced to repel each other.
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hansvonlieven

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Re: Howard Johnason linear track accelerator video
« Reply #22 on: March 31, 2009, 01:48:01 AM »
Sorry, i posted the comment before finishing it LOL You answered my question

Hans ;D
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broli

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Re: Howard Johnason linear track accelerator video
« Reply #23 on: March 31, 2009, 01:49:16 AM »
Quote from: hansvonlieven on March 31, 2009, 01:48:01 AM
Sorry, i posted the comment before finishing it LOL You answered my question

Hans ;D

Yeah I'm a fast one. And yes they have to be glued or duct taped together.
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Pirate88179

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Re: Howard Johnason linear track accelerator video
« Reply #24 on: March 31, 2009, 02:11:17 AM »
Just a note from some of my own experiments with magnets.  I took 2 neos (1/2 inch dia.) and superglued them in the repelling positions just to see what happened.  Guess what?  The pole reversed on one of the magnets and it now became just a thicker magnet with  n/s poles.  I still have it sticking on my fridge and the poles are still reversed on one of the magnets....I have no idea which one but....just wanted to pass this on.  If you glue two opposing magnets together you do not get 2 south or north poles.  Try it and see for yourself.  It is not easy, I had to use vicegrips as these neos are very strong.

Bill
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broli

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Re: Howard Johnason linear track accelerator video
« Reply #25 on: March 31, 2009, 02:21:46 AM »
Quote from: Pirate88179 on March 31, 2009, 02:11:17 AM
Just a note from some of my own experiments with magnets.  I took 2 neos (1/2 inch dia.) and superglued them in the repelling positions just to see what happened.  Guess what?  The pole reversed on one of the magnets and it now became just a thicker magnet with  n/s poles.  I still have it sticking on my fridge and the poles are still reversed on one of the magnets....I have no idea which one but....just wanted to pass this on.  If you glue two opposing magnets together you do not get 2 south or north poles.  Try it and see for yourself.  It is not easy, I had to use vicegrips as these neos are very strong.

Bill

That defies common sense as neo's need quite a large field to reverse them. I've tried both neos on neos and ferrites on ferrites and neither flip their friend's pole. If you stick a neo to a ferrite that's another story. Btw you won't find any neo's ring big enough to make a reasonable sized gate. While ferrites can be found very cheaply.
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Pirate88179

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Re: Howard Johnason linear track accelerator video
« Reply #26 on: March 31, 2009, 02:34:52 AM »
Well, with all due respect, you may say it defies common sense but that is what happens.  I am looking at them now.  Yes, only 1 north and 1 south pole.  As I said in my post, try it yourself and you will see.  If not, maybe it is possible I found the only 2 neos in the world that this will happen to but, I rather doubt that.  As I said, try it and one of us will learn something.  If you indeed get different results, I would be very interested in hearing about it.  Thanks.

Bill
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broli

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Re: Howard Johnason linear track accelerator video
« Reply #27 on: March 31, 2009, 02:38:14 AM »
Quote from: Pirate88179 on March 31, 2009, 02:34:52 AM
Well, with all due respect, you may say it defies common sense but that is what happens.  I am looking at them now.  Yes, only 1 north and 1 south pole.  As I said in my post, try it yourself and you will see.  If not, maybe it is possible I found the only 2 neos in the world that this will happen to but, I rather doubt that.  As I said, try it and one of us will learn something.  If you indeed get different results, I would be very interested in hearing about it.  Thanks.

Bill

Quote from: broli on March 31, 2009, 02:21:46 AM
That defies common sense as neo's need quite a large field to reverse them. I've tried both neos on neos and ferrites on ferrites and neither flip their friend's pole. If you stick a neo to a ferrite that's another story. Btw you won't find any neo's ring big enough to make a reasonable sized gate. While ferrites can be found very cheaply.

These magnets are next to me duct taped together. I don't want to start a ridiculous conversation about this so please let's drop it here.
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0c

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Re: Howard Johnason linear track accelerator video
« Reply #28 on: March 31, 2009, 02:39:19 AM »
Quote from: broli on March 31, 2009, 02:21:46 AM
Btw you won't find any neo's ring big enough to make a reasonable sized gate. While ferrites can be found very cheaply.

http://www.supermagnetman.net/product_info.php?cPath=41&products_id=420

Definitely not cheap!
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broli

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Re: Howard Johnason linear track accelerator video
« Reply #29 on: March 31, 2009, 02:44:28 AM »
Quote from: 0c on March 31, 2009, 02:39:19 AM
http://www.supermagnetman.net/product_info.php?cPath=41&products_id=420

Definitely not cheap!

Yes sorry I was wrong. I should change that to "affordable enough".  ;D

Here you see a bigger sized ferrite magnet for the a fraction of that price

http://cgi.ebay.com/Large-Powerful-Ring-Ceramic-Magnet-2640g-94oz-8_W0QQitemZ330318441532QQ

So two cost 30$ while the neos would cost 850$. Also that website points it out quite nicely. This magnets are extremely dangerous and hard to handle.
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