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6 mm piston valve plinker

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: jackssmirkingrevenge » Thu Mar 10, 2011 7:18 am

mark.f wrote:If you're just relying on a close fit to take care of your equalization, the tolerances required are nowhere near 0.01mm... more like 0.1mm

I wouldn't say that as an absolute, because it's contingent on the diameter of your piston (for example 0.1mm tolerance on a 1" piston will leak 4 times more than 0.1mm tolerance on a 1/4" piston) and it also depends on what you're using as a pilot. My best advice would be to do the math.
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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Unread postAuthor: mark.f » Thu Mar 10, 2011 7:23 am

I wouldn't say it was an absolute either. Most of the times when I built pistons without o-rings I just wrapped the pistons in tape until they fit snugly.
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