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My first over under 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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Unread postAuthor: DYI » Tue Oct 02, 2007 4:53 pm

That long barrel? Judging by the pressure drop, the barrel should be about 8x as long as it already is. Ball valves are OK with the right length of barrel, but with such a short, low diameter barrel, a fast valve is far better.
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Unread postAuthor: roughboy » Wed Oct 03, 2007 1:02 am

Simple and powerful,i like it,but it would be more powerful if you replace the 1/2'' ball valve with a modded sprinkler valve.
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Unread postAuthor: spudgunnerwryyyyy » Wed Oct 03, 2007 8:21 pm

I piston valves rock to but brass ball valve own with high pressures and they never leak. They also are just plain amazing. Also you need them to build a piston valve in most cases.
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Unread postAuthor: tsb » Wed Oct 17, 2007 4:42 am

@ the auzzie...
You can get a good HR sprinkler valve for $35 (im auzzie to) at a local irrigation shop (look in yellow pages)

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tsb
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Unread postAuthor: Marco321 » Wed Oct 17, 2007 5:38 am

I'm an aussie as well, i got my 25mm (roughly 1") sprinkler valve from bunnings, cost me around AU$15
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