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multi barled mini launcher?

Discuss miniature cannons built from things such as pill bottles and pen caps.
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multi barled mini launcher?

Unread postAuthor: facist7 » Mon Apr 06, 2009 7:20 pm

i was planning to make a multi barled mini with a small plastic bottle and some pens.
how many barrles could i get away with?

p.s. i want it to shoot in shotgun spread pattern
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Unread postAuthor: spudtyrrant » Mon Apr 06, 2009 7:33 pm

you could probably have 10 barrels depending on what your definition of "small" is and whether it is combustion or pneumatic
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Unread postAuthor: dudeman508 » Mon Apr 06, 2009 8:05 pm

Can we have some more info on your desin:
Pneumatic or combustion?
how big is plactic bottle?
How many bbs you want to shoot?
Cloud?
Ect
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Unread postAuthor: facist7 » Mon Apr 06, 2009 8:41 pm

the barrles are the size of a bic pen, it is combustion, and the bottle would be the size of a gatorade bottle.
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Unread postAuthor: Kazekiel » Mon Apr 06, 2009 9:01 pm

How about a soda can, even though it doesn't have as much of a cubic volume the overall cannon would look better. And it would be able to house more barrels. On top of everything else it would be cheaper to mass produce, if you want to.

Oh, and having a lot of barrels isn't always best, because your not going to have as much power behind every shot.
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Unread postAuthor: spudtyrrant » Mon Apr 06, 2009 9:12 pm

facist7 wrote:the barrles are the size of a bic pen, it is combustion, and the bottle would be the size of a gatorade bottle.


i would suggest 6 barrels it would give a nice mini-gun look and still have plenty of power when you shot it. and if you wanted more than six shots just double load each barrel.
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Unread postAuthor: facist7 » Mon Apr 06, 2009 9:42 pm

sweet...ill try to make one and then ill post sum pics
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Unread postAuthor: jimmy101 » Tue Apr 07, 2009 11:07 am

Never seen this question before, "how do you size the chamber and barrels when there are multiple barrels in a combustion gun?"

:idea: Figure the total volume of the barrels should be about the same as the total volume of the chamber. That is, the CB is about 1 when the volume of all the barrels is taken into account.

For a bit more oomph (but lower efficiency) you might go for say a CB of 2.

Using pen bodies as the barrels you could probably use several on a standard size perscription pill bottle chamber. For the much larger Gatorade type bottle you can probably use a lot of barrels.

Or, get some 1/2" to 1" copper pipe and use a single barrel. Make a sabot for a bunch of BBs out of cardboard. That would be a lot simpler to build and reload.
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Unread postAuthor: mikemurph » Wed Apr 29, 2009 10:36 pm

I've made a four barreled one before, but it was soo weak, so i junked it and used the sparker for something else, i wouldn't recommend multiple barrels, unless you have a lot of power behind it, or multiple chambers
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