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Forums
4hv.org :: Forums :: Electromagnetic Projectile Accelerators
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Magnetic Munition

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razorbud
Thu May 03 2007, 03:07PM Print
razorbud Registered Member #679 Joined: Thu May 03 2007, 02:59PM
Location:
Posts: 3
Hi

I was wondering if anyone hs thought about using a magnetic bullet in a coil gun? I was thinking about it the other day and wondered if you could pulse the coils twice, the first pulse is the same as a normal non magnetic bullet coil gun pulse, cutting off before the fied reverses and you get suck back. The second would be when half of the bullet is out of the other end of the coil to give it another push?

Wondering what you guys would think of that?
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FastMHz
Thu May 03 2007, 04:30PM
FastMHz Registered Member #179 Joined: Thu Feb 16 2006, 02:08AM
Location: Hagerstown, Maryland - Close to Prime Outlets
Posts: 287
I've never attempted to launch a magnetic projectile....if I can somehow shape one of my magnets into a round slug that'll fit my CG I'll give it a go.
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razorbud
Thu May 03 2007, 04:52PM
razorbud Registered Member #679 Joined: Thu May 03 2007, 02:59PM
Location:
Posts: 3
i was thinking of more along the line of a slug shaped projectile.
It would be relatively easy to turn one into a magnet by just stoking the slug with a hard magnet in on direction lots of times.
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Bjørn
Thu May 03 2007, 06:54PM
Bjørn Registered Member #27 Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
If your projectile can be magnetized that easy, what do you think will happen when it is placed in a magnetic field that is 1000 times stronger in the coil gun?
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Electroholic
Thu May 03 2007, 07:07PM
Electroholic Registered Member #191 Joined: Fri Feb 17 2006, 02:01AM
Location: Esbjerg Denmark
Posts: 720
if you can magnitize your projectile with a strong magnet, what makes you think that your coil won't demagnetize or magnetize it the other way when you fire the coil gun.
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Effilcdar
Thu May 03 2007, 10:27PM
Effilcdar Registered Member #655 Joined: Wed Apr 18 2007, 10:23AM
Location:
Posts: 14
These would seem to be your best bet
Ebay #
160109966236 Large but powerfull
160110001500 small but cheap
250109710446 still a little large
110120399493 this seems to be a good size

Neodymium resists demagnetization but its brittle and light compare to other balistic materials.
Keep in mind if you want to try somthing like how many of the magnets will be available for sale. It would be very regretable if you were to break your last magnet and find that you can't find more the same size.
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razorbud
Thu May 03 2007, 10:43PM
razorbud Registered Member #679 Joined: Thu May 03 2007, 02:59PM
Location:
Posts: 3
I do electronic and electrical engineering at university and they use magnetized poles in large solenoids.

The stroking method only works for soft magnetic materials, a good material would be a hard magnetic slug.
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Electroholic
Thu May 03 2007, 11:37PM
Electroholic Registered Member #191 Joined: Fri Feb 17 2006, 02:01AM
Location: Esbjerg Denmark
Posts: 720
Neodymium magnets resists demagnetization? you sure?
a solenoid is not a coil gun. at least not the ones we play with around here.

heres another link
Link2
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plur
Sun Jul 08 2007, 06:23PM
plur Registered Member #886 Joined: Sun Jul 08 2007, 06:10PM
Location:
Posts: 1
hi iam new..... any way ive been doing tests with some thing simlar but instead of a magnetic bullet ive been useing a steel bb and crushed ceramic magnets pack down in the base of the barral, the disanct the bb tavals has gone from (my frist coil gun) about a foot to about 10 - 15 feet with no other ajustments to the gun but not evry shot is relable some times it take a few pules for it to fire
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Dalus
Sun Jul 08 2007, 07:09PM
Dalus Registered Member #639 Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512
plur wrote ...

hi iam new..... any way ive been doing tests with some thing simlar but instead of a magnetic bullet ive been useing a steel bb and crushed ceramic magnets pack down in the base of the barral, the disanct the bb tavals has gone from (my frist coil gun) about a foot to about 10 - 15 feet with no other ajustments to the gun but not evry shot is relable some times it take a few pules for it to fire

I used magnets from a old scsi hard drive on both sides of the coil and found that the efficiency increases. One explanation is that the field from the coil gets confined in the center of the coil by the external magnets.
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