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Looking for a good gun to build

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: Bluetooth » Sun Jan 07, 2007 5:27 pm

He's making his first gun with a sprinkler valve.
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Unread postAuthor: Claybob86 » Sun Jan 07, 2007 5:56 pm

^^ is that a bad thing?

btw, neither lowes or home depot had a sprinkler valve. so i ended up getting a 3/4" ball valve.
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Unread postAuthor: Bluetooth » Sun Jan 07, 2007 6:03 pm

No, it's not bad but most people don't make their first gun out of metal. Come to think of it most people don't make metal guns at all.
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Unread postAuthor: Claybob86 » Sun Jan 07, 2007 6:09 pm

i wasnt going to use metal....

hey bluetooth, if your on AOL or AIM, shoot me an IM, my sn is ctr2004
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Unread postAuthor: garrettee » Mon Jan 08, 2007 4:59 pm

Hey Claybob, what part of Ky you from? I'm from Bullitt co. And I just bought a 3\4" Rainbird sprinkler valve from lowes. There located in the plumbing , irrigation section. And if you buy one, there are very easy modding directions in the construction materials forum. Good luck.
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Unread postAuthor: squeaks » Mon Jan 08, 2007 5:14 pm

Okay, your big problem is that you're shopping at lowes. Lowes and home depot have nothing plumbing wise. You need to go to a local plumbing store. I live here in cedar city where the population of the whole county is 50,000 and we have 2 plumbing stores here in town. I'm almost certain there is one near you that can get you what you need.
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Unread postAuthor: Claybob86 » Mon Jan 08, 2007 8:05 pm

i decided not to build yesterday bc of lousy materials, boooo. I decided to order a Rain Bird 1" valve, heres a pic. Do you all think it will work alright?

http://www.rainbird.com/parts/images/thumbnails/B36296_lg.jpg?id=2398
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Unread postAuthor: squeaks » Mon Jan 08, 2007 10:12 pm

U-shaped sprinklers do work, especially with over under guns. I don't know how to modify a u-shaped valve to actuate pnuematically but frankrede here on this site does know how to. It improves performance immensely so I highly recommend you talk to him about it.
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Unread postAuthor: Claybob86 » Mon Jan 08, 2007 10:21 pm

awesome, i hope to be picking this up tomorrow or weds and build this weekend! ill let you all know the outcome. I did a little research and found that a good c:b ratio for a pneumatic gun is 1.5:1. so how does a 36" long, 2" chamber, and a 42-45", 1.5" barrel sound?
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Unread postAuthor: squeaks » Mon Jan 08, 2007 10:36 pm

sounds perfectly fine. Should work good. Best of luck to you and happy spudding.
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Unread postAuthor: cobast » Sun Jan 21, 2007 4:07 am

Plus, if you have a tiny itty bitty compressor like mine then you can just let it sit while your compressor fills it up over the next 5-10 minutes.

My chamber is 4" by 5.5" and my little 12v compressor blows it up to 35psi in less than 10 seconds. I'ts ready to launch before i've loaded the tennis ball n the barrel.
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Unread postAuthor: Infernal2 » Sun Jan 21, 2007 3:02 pm

Metal is a pain in the ass for your first gun. At least, that's what everyone keeps telling me.
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