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Old 03-16-2007, 05:29 PM
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Mallow Cannon

Ok, so it's not a paintball weapon, but it will be a pneumatic firing device. I'm asking all the people here that have experience in home constructed LAW's and launchers for input on this.

It sounds crazy and I know it's overkill, but I just don't want to resist the urge. I'm going to a marshmallow fight in a few weeks and we've been instructed to bring our own "cannons." Now the plans that have been distributed to the people amount to nothing more than a PVC blowgun. That's just too weak in my eyes. Not only that but this is a great excuse to break out some paintball gear ( how many mini-mallows can fit in a 10 round tube? )

So, long intro aside, I want to build a marshmallow cannon. It doesn't necessarily have to be extremely complex, but something where I can plug in a 12 gram and get about 50 shots off would be so cool. Also, since not everyone there will have facial protection, I realize that the pressure used will be very small indeed. What kind of valves, systems, frames, whatever can you guys think of that might be helpful? I can even use the frames of my A-5 and T-8 as a basis so long as I don't have to permanently mod them. What do you think?

Last edited by Jaron : 03-16-2007 at 05:34 PM.
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Old 03-16-2007, 06:52 PM
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Re: Mallow Cannon

In this instance I'd stear clear of CO2. I don't think you'll be able to get 50 shots out of a 12 gram. I can't even think of many paintball guns that can claim that. In this instance I'd use something like this to pressurize it, and either use a pvc ball valve or a sprinkler valve to fire it.
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Old 03-16-2007, 07:07 PM
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Re: Mallow Cannon

You're right, I don't know of any paintball gun that can get that either under normal conditions, but I'm also not trying to fire these things at 280 fps either. I figure I should be able to crank the gas usage way down in that regard.

Ok, so here's an idea I had. I can use my T-8 as a basis. Then, I get some PVC pipe to insert into the barrel, stopping short of where the bolt reaches when fired. Immediately outside the barrel is a T fitting with the open end facing up. Here I can just insert 10 round tubes full of mini mallows. That way the top is still sealed so I'm not wasting much gas going up that way when firing. Out the other side the pipe continues to act as the actual barrel. So when firing hopefully just the bottom mallow ( and maybe the one above it, ) catch the air and get blown out. It's definitely not perfect, but it is simple to build. If I get lucky I might even find some pipe that sized right to make a whole barrel out of. I'll try it out and see what happens unless someone has a better idea.
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Old 03-18-2007, 04:47 AM
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Re: Mallow Cannon

Try this one out. Got one as a gift, then bot one for for my father in law. We have the most fun with these. But be warned, matrix style moves over the couch not suggested.


http://www.marshmellowshooter.com/
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Old 03-18-2007, 08:08 AM
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Re: Mallow Cannon

You could turn the velocity on your paintball gun way down, cut marshmellows into a ball shaoe and fire away. Now to be serious. I made something close to this a long time ago by attaching one of those air rocket launchers that you jump on to a tube and put a snowball in it. It worked decently until my brother toar apart the thing you jump on. Anyways good luck with your creation.
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Old 03-19-2007, 04:29 PM
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Re: Mallow Cannon

Quote:
Originally Posted by oldschool
Try this one out. Got one as a gift, then bot one for for my father in law. We have the most fun with these. But be warned, matrix style moves over the couch not suggested.


http://www.marshmellowshooter.com/
I've seen those, but $25 for the shooter and $5 for shipping doesn't appeal to me, at least not now.
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Old 04-19-2007, 06:06 PM
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Re: Mallow Cannon

For those who care, not many I'm sure, it's complete!

In the end I opted to make an attachment on my T-8 since it has a full regulator and can take the air pressure down to safe levels. I found out in testing that mallows can leave a welt, believe it or not, so I cranked this down to about 100 fps. It's basically some 1/2" PVC pipe that slides on the end of my T-8, though some sanding is required to open the pipe end up a little.

Here's a diagram of what I did, Imagine the top half has been sliced off. The epoxy in the T fitting was used to bring the interior diameter to the same level as the pipe so the mallow doesn't have anything to catch on the way out. The rear rubber washer was put in to keep the mallow from rolling backward into the T-8. I also put a top rubber washer on the top feed port to help seal around the ammo tube to keep too much air escaping that way. I'll try to get some photos up somewhat soon.

I'm trying to figure out a more stable attachment system than just friction to hold it on the end of the barrel, which doesn't have much to hold on to. Any suggestions?
Attached Images
File Type: gif mallow.gif (31.7 KB, 23 views)

Last edited by Jaron : 04-20-2007 at 02:17 AM.
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Old 04-19-2007, 07:22 PM
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Re: Mallow Cannon

unfortuatly i don't see your diagram, but definitly get some pics up.
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Old 04-19-2007, 07:38 PM
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Re: Mallow Cannon

I'm working on drawing it right now, I'll have it up shortly.
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Old 04-19-2007, 08:02 PM
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Re: Mallow Cannon

I have a potato launcher. It's made out of PVC. I can't remeber the exact sizes but its like 1'6" of 3 inch PVC converted down to like 3-4' of 1.5" innch PVC. The back end of the 3" was closed with a threaded cap and everything was held together by tht PVC cement stuff. We countersunk a lantern lighter (a little thing that you turn and a piece of flint creates sparks) so that the turning half was outside of the PVC and the sparking half was inside. You then shove a potato up the "barrel" or 1.5" pipe, open the cap on the 3", spray in some hairspray, close it up, and turn the lantern lighter...BOOM...

These things go extremely far. You can launch them over the tops of large trees and probably get about 400-500' out of them... rough estimate though i havent ever measured...

It looks to me like you want something that will shoot faster and without as much work. This may not be what you are looking for but i figured I would post it in case it helps at all... and for those of you that have some extra time on your hands... haha
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