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piston bumper 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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piston bumper problems

Unread postAuthor: lukemc » Sat Apr 21, 2007 9:24 am

i made a 2" coaxail piston valve and have final come across a problem. my bumper.
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this was my original plan with the bumper behind the ball valve. the threaded part is so i can have access to the piston if it dosent work but i just realzed that the ID of 2" male threaded adapter is smaller than the ID of 2" pipe

this a picture of the male adaptor inside the female adapter. you can see it is consiterably smaller
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the peices inside each other form the side
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and my piston
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the only thing i can think of it to just have the bumper inbetween the fittings but i cant close it off how would i go about doing this? help would realy...well help :D
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"Those who are different change the world. Those who are the same keep it that way"
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Unread postAuthor: spudthug » Sat Apr 21, 2007 10:17 am

put some sort of hose around a fitting like u said...air hose...bike tube...anything works...expandable foam works the best but it has to be glue some how
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4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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