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Idea for an automatic cannon

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Idea for an automatic cannon

Unread postAuthor: <(-_-)> » Sun Oct 28, 2007 3:35 am

First of, since this is my first post, Hi!

Anyway, I have made quite a few potato cannons and I have always wanted an automatic one. The only method to make an automatic that I can think of is to have a "hopper" below the barrel filled with ammo that operates on bernoulli's principle. for those of you who dont remember this from 3rd grade, its what makes airplanes stay up (try a google search). I was wondering if you guys think this would work or if anyone has done this yet? Thanks!
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Unread postAuthor: jackssmirkingrevenge » Sun Oct 28, 2007 3:42 am

You mean something like this? If so, it's how most home built BB machineguns work, we even have a whole section dedicated to them ;)
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Unread postAuthor: <(-_-)> » Sun Oct 28, 2007 3:44 am

Exactly like that but shooting golf balls or something. Thanks!
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Unread postAuthor: Tom » Sun Oct 28, 2007 3:47 am

Then you would need a very big cloud or vortex, maybe it's a bit smarter to shoot some smaller ammo :D .
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Unread postAuthor: <(-_-)> » Sun Oct 28, 2007 3:54 am

Actualy, slightly different. This dosesn't work on the Venturi Effect.
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Unread postAuthor: jackssmirkingrevenge » Sun Oct 28, 2007 4:00 am

<_> wrote:Exactly like that but shooting golf balls or something. Thanks!


It's been done with marbles, golf balls and possibly tennis balls though i'm not sure if that was just a pipe dream or actually made.

For usch a device you'll need one hell of a propellant gas supply, which is why most people are happy to stick to 0.177" caliber ;)
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Unread postAuthor: veginator » Sun Oct 28, 2007 7:56 am

For golf balls you would probably need a scuba tank regulated to 1000 psi but if you could do it that might be more impressive than that stainless steel combustion.
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Unread postAuthor: DYI » Sun Oct 28, 2007 9:04 am

DR did it with a large air compressor at 150 or so psi, so it's certainly within the realm of possibility.
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Unread postAuthor: <(-_-)> » Sun Oct 28, 2007 12:04 pm

HeHe... I just happen to have a 40 gallon compressor in the back of my truck...
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Unread postAuthor: BC Pneumatics » Sun Oct 28, 2007 12:10 pm

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Unread postAuthor: <(-_-)> » Mon Oct 29, 2007 8:46 pm

I am going to try it for my next project. It will just be a paintball pistol to try it out and if it works I will make one that shoot golf balls.
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Unread postAuthor: spudgunnerwryyyyy » Mon Oct 29, 2007 9:14 pm

You should tap a hose adapter after the valve and run a section of tubing to under the hopper to get things moving. Try ur idea.
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