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Piston problems

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: jrrdw » Thu Jul 03, 2008 6:22 am

The piston in the picture looks like it's flat sided, thats no good, wrinkles in the tape a big nono. A piston with slight drag and eq hole works best. Build a good bumper system, and use Oak if you can get it.
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Unread postAuthor: psycix » Thu Jul 03, 2008 6:39 am

If you could use o-rings, your problems would be solved.
Either that, or build a new piston, or else just try to re-apply tape, and this time the tape has to be perfectly smooth.
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Unread postAuthor: vovka351 » Thu Jul 03, 2008 9:45 am

i heard 3/4inch endcaps work for 1.5 inch pistons
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Unread postAuthor: frankrede » Thu Jul 03, 2008 2:11 pm

psycix wrote:If you could use o-rings, your problems would be solved.
Either that, or build a new piston, or else just try to re-apply tape, and this time the tape has to be perfectly smooth.
I can use O-Rings(lathe+assorted large o ring set) I just don't have any wood dowels over 1"
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Unread postAuthor: Carlman » Thu Jul 03, 2008 2:14 pm

frankrede wrote:
psycix wrote:If you could use o-rings, your problems would be solved.
Either that, or build a new piston, or else just try to re-apply tape, and this time the tape has to be perfectly smooth.
I can use O-Rings(lathe+assorted large o ring set) I just don't have any wood dowels over 1"


if you have a lathe why don't you turn down a bigger piece of wood?
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Unread postAuthor: psycix » Fri Jul 04, 2008 6:15 am

You have a lathe?! Then whats your problem?
Order a nylon rod or something and machine out that perfect piston!
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