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piston valve?

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 valve?

Unread postAuthor: rhyce » Thu Jul 05, 2007 6:03 am

hello i was wondering how do you make a piston gun i have made a pneumatic gun but the barrel went straight to the barrel and it shot well but people think that a piston would be so much better so i have decided to go with a piston valve but i just cant find the right resource's and where to actually make one (and i mean the hole gun) so can someone please give me some easy links that can help me follow how to make a piston gun so i can fire marbles.

and yes i have already tried wiki and searched forums and how-to i have tried everything but i just cant find anything so help would be really appreciated
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Unread postAuthor: spud yeti » Thu Jul 05, 2007 6:24 am

How can you not find them if you looking!? Joking, heres some animations by clide on how they work: http://www.spudfiles.com/forums/piston- ... t8157.html
and here some peoples guns: http://www.spudfiles.com/forums/viewtop ... 2e920ad66f
http://www.spudfiles.com/forums/viewtop ... 0483a6b247
and heres your wiki :wink: : http://www.spudfiles.com/spud_wiki/inde ... ston_valve
if you need anything else, search, or just ask!
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really good quote/phrase here
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Unread postAuthor: Gepard » Thu Jul 05, 2007 6:26 am

spud yeti wrote:<snip>search, or just ask!


No, search and THEN ask.

:D

Michael
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Unread postAuthor: rhyce » Thu Jul 05, 2007 6:30 am

what type of piston shold i go with?
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Unread postAuthor: chaos » Thu Jul 05, 2007 6:32 am

haha i sense a locked topic coming on

BTW Welcome :newb: To Spudfiles
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Unread postAuthor: spud yeti » Thu Jul 05, 2007 6:32 am

coaxial are probably the easiest and give good results.
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Unread postAuthor: rhyce » Thu Jul 05, 2007 6:38 am

oh crap! i dont under stand if the piston is ment to push the projectile out then how come when the air flows behind it, it doesn't already knock the piston like on the animation. and how does the piston fall back into place?

Merged:

actualy i understand what i said above after watching it a few more times but how do you actualy make a exhaust valve do you use a ball valve or what?
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Unread postAuthor: spud yeti » Thu Jul 05, 2007 6:44 am

mmm, ok.... what happens is the piston is pushed foward by the air and seals the barrel. It leaks around the piston and into the chamber. The chamber is full now. When the air is released from the pilot area (the area behind the piston) by means of a pilot valve (often ball valves and sprinkler valves are used) the air in the chamber pushes the piston back and the air goes out the barrel and shoots the projectile. Just look/read clides animations to see more!

btw, please do not double post, use the edit button and this topic should not be here, it should be under pneumatic discussion.
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Last edited by spud yeti on Thu Jul 05, 2007 8:29 am, edited 1 time in total.
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Unread postAuthor: chaos » Thu Jul 05, 2007 6:45 am

go do more research and spoon feed topics like this would not be needed


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Unread postAuthor: rhyce » Thu Jul 05, 2007 6:48 am

ok chaos i was just curious this is the only time i actualy put into consideration that i wont to make a piston valve so now i am going to do it and for FREE!!!! yay :o

thanx spud yeti for the help
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Unread postAuthor: spud yeti » Thu Jul 05, 2007 8:31 am

OK, but next time please do not double post, use the edit button and this topic should not be here, it should be under pneumatic discussion.
Good luck for your construction
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