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Forums
4hv.org :: Forums :: Electromagnetic Projectile Accelerators
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A crazy idea

Move Thread LAN_403
Reid
Sun May 03 2009, 12:50AM
Reid Registered Member #2064 Joined: Sat Apr 04 2009, 09:26PM
Location: NJ, USA
Posts: 16
I was thinking about gauss rifles, the way they use natural magnets to the same effect as a coilgun...
two magnets attract more violently than a single magnet attracts a piece of iron
therefore, a naturally magnetic projectile will do better than something like iron that must be magnet.

What kind of magnets would you suggest?
where to get them?
is a plastic barrel better than a metal barrel, or no barrel?

Also, I was looking at my local radioshack for some sort of relay or transistor that could carry 300v, couldn't find anything. suggestions? (I would realy like to move off of a spark-gap - this is what I've got... link)


[Edit: Changed hhttp to http in the link]
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Myke
Sun May 03 2009, 01:47AM
Myke Registered Member #540 Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
People have tried this before. The problem was that the magnetic fields are normally too strong in the coil so it ends up demagnetizing the magnet. Also, magnets tend to be pretty fragile (if you want a strong field).
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Reid
Sun May 03 2009, 02:04PM
Reid Registered Member #2064 Joined: Sat Apr 04 2009, 09:26PM
Location: NJ, USA
Posts: 16
even Neodymium magnets? I find that a little hard to believe.
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rp181
Sun May 03 2009, 03:07PM
rp181 Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
Yes, even those. Sometimes, it will switch the polarity of the magnets.
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MachineShop
Wed May 06 2009, 02:32PM
MachineShop Registered Member #2107 Joined: Mon May 04 2009, 05:02AM
Location:
Posts: 12
Reid wrote ...

I was thinking about gauss rifles, the way they use natural magnets to the same effect as a coilgun...
two magnets attract more violently than a single magnet attracts a piece of iron
therefore, a naturally magnetic projectile will do better than something like iron that must be magnet.

What kind of magnets would you suggest?
where to get them?
is a plastic barrel better than a metal barrel, or no barrel?

Also, I was looking at my local radioshack for some sort of relay or transistor that could carry 300v, couldn't find anything. suggestions? (I would realy like to move off of a spark-gap - this is what I've got... link)


[Edit: Changed hhttp to http in the link]

but it is true. i had a horible coil that i wasnt getting any strenth out of and out of curiosity i stuffed my barrel full of little rare earth magnets(the crap ones from radio shack:P) and it was so excited i still havnt found a single one of the darn things! =]
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