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Forums
4hv.org :: Forums :: Electromagnetic Projectile Accelerators
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Mini Gaussian Gun

Move Thread LAN_403
Nucleophobe
Sun Apr 30 2006, 07:27PM
Nucleophobe Registered Member #108 Joined: Thu Feb 09 2006, 11:44PM
Location: Billings, MT
Posts: 61
Video Here

I don't have an neodymium magnets, but it looks like a neat trick. Can anyone explain why or how it works??
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Self Defenestrate
Sun Apr 30 2006, 08:05PM
Self Defenestrate Registered Member #87 Joined: Thu Feb 09 2006, 01:36PM
Location: San Jose
Posts: 191
The setup makes it look like the first ball bearing is going quite slow, but it actually is going the same speed as the bearing propelled off the end when it hits the magnets. The extra ball bearings are inbetween the magnets and the projectile ball bearing to weaken the feild the magnets have with the projectile, and transfer the kinetic energy.

Edit: See here, Link2
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Electroholic
Sun Apr 30 2006, 09:20PM
Electroholic Registered Member #191 Joined: Fri Feb 17 2006, 02:01AM
Location: Esbjerg Denmark
Posts: 720
the input speed and the output speed are not the same,
potential energy is stored in the setup.
Link2
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Avalanche
Sun Apr 30 2006, 09:28PM
Avalanche Registered Member #103 Joined: Thu Feb 09 2006, 08:16PM
Location: Derby, UK
Posts: 845
Reminds me of the newtons cradle.

Just think of it as that, except the neo magnets are what attracts the first ball bearing, and the neo magnets are part of the newtons cradle. The long strip of bearings after the magets mean that there isn't much of a force holding that last ball back, so off it flies.
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Madgyver
Sun Apr 30 2006, 09:30PM
Madgyver Registered Member #177 Joined: Wed Feb 15 2006, 02:16PM
Location: Munich, Germany
Posts: 214
True, still any speeds/forces greater then those involved in a small CG will shatter the magnets.
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Self Defenestrate
Sun Apr 30 2006, 11:57PM
Self Defenestrate Registered Member #87 Joined: Thu Feb 09 2006, 01:36PM
Location: San Jose
Posts: 191
What about having a slidable box around the magnet, so the bearing hits the box, and transfers energy through that?
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...
Mon May 01 2006, 01:39AM
... Registered Member #56 Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
This was discussed in quite a bit of detail on the old forum.

I was decided that to get any resonable power out would involve shattered magnets. Ideas for protecting the magnets were mainly focused arround putting a decently thick piece of metal arround the magnet, which would decrease the feild, killing efficiency.

Here are the old forum pages...
really old forum
old forum
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