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My first pneumatic

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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My first pneumatic

Unread postAuthor: battousai555 » Mon Jul 30, 2007 9:54 pm

Hello everyone. I just thought I'd post some pictures of a simple pneumatic I just made so I could get some feedback.

Specs:
sch. 40 PVC
2"X3.75' Chamber
1.5"X4' Barrel
1" Brass ball valve

Here is a video of me shooting at an almost empty spraypaint can with a potato and a couple of rocks: http://www.youtube.com/watch?v=0UsZIguChoY

If you watch closely you can see a cloud of blue spraypaint blow into my face. The video also includes me shooting a glass bottle, and my friends shooting their combustion cannon. My friend swears once or twice (just a heads up).

What do you think of the C:B ratio? If the PVC is rated up to 280 PSI, does that mean that it's perfectly fine to fill it to 200 PSI?
Comments/suggestions will be greatly appreciated.
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Attachments
Spud Gun (lawl).JPG
Here's the whole cannon (I know it's a little crooked).
Spud Gun (lawler-valve).JPG
A closer look at the valve. (Please tell me if something looks wrong)
Spud Gun (damage).JPG
Water-filled milk jug shot with 1"X.5' metal pipe. The first shot was too high and skimmed the top, just breaking the lid. The second shot went through both sides and went about 60-70 meters.

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Unread postAuthor: hi » Mon Jul 30, 2007 9:56 pm

wow, that is very clean for a first, its way better than my first.
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"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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Unread postAuthor: battousai555 » Mon Jul 30, 2007 9:57 pm

hi wrote:wow, that is very clean for a first, its way better than my first.

Thanks. That was a wicked-fast response! How did you do that?
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Unread postAuthor: mike1010 » Tue Jul 31, 2007 12:21 am

there was 2 min maybe a coincidence, pretty good for a firt
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Unread postAuthor: battousai555 » Tue Jul 31, 2007 2:09 am

mike1010 wrote:there was 2 min maybe a coincidence, pretty good for a firt

Thanks. Would increasing the length of the chamber increase power?
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Unread postAuthor: jackssmirkingrevenge » Tue Jul 31, 2007 2:14 am

battousai555 wrote:Would increasing the length of the chamber increase power?


Not as much as fitting a modded sprinkler valve would ;) and yeah, if your fittings are sound, I'd be comfortable taking to 200 psi, but not much higher.
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Unread postAuthor: Mitchza89 » Tue Jul 31, 2007 4:27 am

Thats a really nice 1st gun mate. Ya can't just beat simplicity.
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Unread postAuthor: f.c » Tue Jul 31, 2007 5:30 am

very nice alot like my first. keep up the good work.
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Unread postAuthor: dauphinoise potato » Tue Jul 31, 2007 7:38 am

Well done nice first cannon a bit like my first cannon just in PVC.

:headbang:
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It's all a bunch of tree huggin' hippie crap!
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Unread postAuthor: spud yeti » Tue Jul 31, 2007 8:29 am

Looks like a cool spudgun. Well done.
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really good quote/phrase here
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Unread postAuthor: potatoflinger » Tue Jul 31, 2007 8:54 am

That's probably one of the few first cannons that I have ever seen that didn't have DWV on them (at least, I think yours doesn't have any). Very good job!
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Unread postAuthor: battousai555 » Tue Jul 31, 2007 9:01 pm

Thank you all for the comments! I think I want a modded sprinkler valve now . Can anyone give me an average price range for such a valve? Also, could I just remove the ball valve and attach the modded sprinkler valve? Or would I need to make changes to the cannon itself? Thanks in advance.
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Unread postAuthor: jackssmirkingrevenge » Tue Jul 31, 2007 10:35 pm

pity, you just missed the special offer :?
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Unread postAuthor: iPaintball » Tue Jul 31, 2007 11:01 pm

Very nice first cannon! If you are intrested in upgrading to a sprinkler valve, you should buy one from your local hardware store and mod it yourself to save money. A sprinkler vavle will give you a tremendous increase in power, and it will be easier to open. You can expect to pay about $16-$17 for the sprinkler vavle and fittings required to mod it, as opposed to buying a modded valve from BC for about $25 plus shipping.
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Summer Projects:
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Unread postAuthor: spud yeti » Wed Aug 01, 2007 5:14 am

Yeah, a modded sprinkler valve would be a pretty good idea on this cannon, and is really worth it.

BTW, iPaintball, I guess if you dont support BCarms though, less money goes towards supporting this website, which could lead to its demise... But I know what you mean with the price difference, very tempting...
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really good quote/phrase here
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