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Combustion chamber for a simple spud gun

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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Combustion chamber for a simple spud gun

Unread postAuthor: Luc7777 » Sun Jan 04, 2009 2:49 pm

Hey!
Well I'm new to these forums, and I don't know very much at all about spud guns.

I was wondering if as a combustion chamber for a 2 inch PVC pipe, I could use a square 4 1/2 inch see-through plastic container(where food is usually kept like peanut butter, that kind of plastic)? Or if there are any other very easy to find alternatives for a combustion chamber, because i dont have a PVC pipe thats the right size.

Thanks in advance,

Luc
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Unread postAuthor: jrrdw » Sun Jan 04, 2009 2:54 pm

For safty reasons, I say NO WAY! You can order PVC from www.bcarms.com. Where are you from?

Welcome to Spudfiles.
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Unread postAuthor: sputnick » Sun Jan 04, 2009 3:06 pm

DO NOT DO IT

use pipe, and you do not need to order it *rolls eyes* you can buy it at any hardware store, just make sure it is pressure rated. PVC is very cheap, and safer to work with, so just stick with a sure thing,
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Unread postAuthor: Luc7777 » Sun Jan 04, 2009 3:10 pm

Ok, thanks for the fast reply! So noway to do it for now ?
And though this probably seems obvious, why is a combustion chamber
needed ?

Oh and well I'm from Miami/Paris but living in Venezuela.

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Unread postAuthor: sputnick » Sun Jan 04, 2009 3:13 pm

well its where the gasses expand, without it your spud would just sit there,
and if you mean why not just fill the area behind the spud with fuel, its because you need a large combustion to launch the potato, lots of pressure created that will blow the potato out the barrel
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Unread postAuthor: TurboSuper » Sun Jan 04, 2009 3:37 pm

So you're saying that you cannot get your hands on any pipe/fittings with a diameter greater than or equal to 3" ?
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Unread postAuthor: Luc7777 » Sun Jan 04, 2009 4:01 pm

I could, but not today. Thank you sputnick.
Just wondering, well I guess ill go get a 3 inch pipe and fitting later. xP
If theres anyother useful info anyone could give me it would be greatly appreciated.
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Unread postAuthor: jrrdw » Sun Jan 04, 2009 4:06 pm

Luc7777 wrote:I could, but not today. Thank you sputnick.
Just wondering, well I guess ill go get a 3 inch pipe and fitting later. xP
If theres anyother useful info anyone could give me it would be greatly appreciated.


Look through all the showcase sections here on the forum. That will give you plenty of ideas.
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Unread postAuthor: Luc7777 » Sun Jan 04, 2009 4:18 pm

Am doing, see you guys around.
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