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WIP First Gun

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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WIP First Gun

Unread postAuthor: sl33k » Sun Nov 08, 2009 6:37 am

Yea this is my first attempt at making a spudgun,

Specs:
20mm barrel at 40cm

1.25L Soda bottle with a bike valve

Going to add a sight, scope and stock, and a very nice paint job.
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the WIP picture
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The bottle with valve
Trying to be innovative.
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Unread postAuthor: jmadden91 » Sun Nov 08, 2009 6:42 am

Cool, but don't expect very impressive power. I would leave the extra's for your next cannon, may I suggest a sprinkler valve?
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Unread postAuthor: john bunsenburner » Sun Nov 08, 2009 7:24 am

Well its clean for what you made, not that bad. I suggest you look around at the wiki, before wasting money and time upgrading this.

Have a go at making a gun with a sprinkler valve, mod it if you want to, and then use only PVC pipe not soda bottles.
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Unread postAuthor: Mr.Sandman » Sun Nov 08, 2009 9:18 am

john bunsenburner wrote:Well its clean for what you made, not that bad. I suggest you look around at the wiki, before wasting money and time upgrading this.

Have a go at making a gun with a sprinkler valve, mod it if you want to, and then use only PVC pipe not soda bottles.
Well there is nothing wrong with metal either :wink: Anyways it looks ok but as others said it would be a wise desicion to save all those upgrades for a better gun.
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Unread postAuthor: jackssmirkingrevenge » Sun Nov 08, 2009 9:43 am

I would suggest you move to a 6mm barrel, you'll get much better velocity. Using a blowgun as a valve isn't really good for anything above that calibre.
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Unread postAuthor: sl33k » Sun Nov 08, 2009 4:57 pm

ah alright, where could i get a sprinkler valve in Australia?
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Unread postAuthor: jmadden91 » Sun Nov 08, 2009 6:11 pm

Bunnings mate, picked one up yesterday for $23
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Unread postAuthor: Cosmic Muffin » Mon Nov 09, 2009 2:00 am

another Aussie. good stuff. probably too early to delve into it, but save that blowgun for a nice copper piston gun, then incorporate that into a stock, and then you can add your scope and paintjob :wink:
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Unread postAuthor: sl33k » Mon Nov 09, 2009 2:45 am

yea ok, he guess what guys "what?" I just got my pay and im out to get a sprinkler valve :) or should i get nice copper parts to make a piston gun, i want it to be collapsible btw or quite compact...
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Unread postAuthor: inonickname » Mon Nov 09, 2009 3:31 am

sl33k wrote:i want it to be collapsible btw or quite compact...

If you used copper you could run much higher pressures and use a shorter barrel/chamber and still get higher performance.

It's a good start, though performance won't be too excellent. You'll really enjoy it when you move up to a more powerful valve.
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Unread postAuthor: urgle the danish cow » Tue Nov 10, 2009 5:30 pm

how did you get the air from your bottle to the gun airtightly?
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