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New 4 inch piston valved cannon

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: spudthug » Sat Jun 23, 2007 8:52 pm

@da pneu kid- tractor supply was the name of the store

@rmich732-it is a coaxial but it is still a 4 inch piston valve..ill go get the link brb
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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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Unread postAuthor: iPaintball » Sat Jun 23, 2007 8:55 pm

spudthug I love you! I have a Tractor Supply Co. 8 miles from my house! Thank you so much!
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CO2 tank hybrid: Gotta fix the meter :(
Cane gun: Needs a pilot/fill setup
1.5" piston valve gun: Almost done
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Unread postAuthor: spudthug » Sat Jun 23, 2007 8:57 pm

hehe thanks da pneu kid.. now u get cheap golfball barrels!!

here is one 4 inch coaxial psiton valve vented by a sprinkler.

http://www.spudfiles.com/forums/wblteen ... t8543.html

heres another

http://www.spudfiles.com/forums/1-muske ... t8156.html

another

http://www.spudfiles.com/forums/my-firs ... t7714.html

it was wows not franks.. i found it

http://www.spudfiles.com/forums/basic-coxial-t7413.html



ill go find the other ones..i was mistaken though it must not be frankredes...
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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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Unread postAuthor: spudthug » Sun Jun 24, 2007 10:49 am

Ok guys i have a big problem! I need to have access at the piston..how do i do this without glueing it? Is there come sort of plug i can buy or something?? uh...i need help bad

sorry about the double post but i waited a day and no one will see this message if it isnt bumped.. and i need help before i go and buy my parts..
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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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Unread postAuthor: Gepard » Sun Jun 24, 2007 11:00 am

Well Joel bolts the Supah together....

Michael
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Unread postAuthor: praetorian91 » Sun Jun 24, 2007 11:19 am

Gepard is right. I beleive you can bolt that endcap on without too much trouble. It will be much like the top of a sprinkler valve is bolted down, and can e easily accesed for any problems that may occur.

You may need to mess with it a little to get the fit right.
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Unread postAuthor: spudthug » Sun Jun 24, 2007 11:59 am

how do i bolt it down? its not like a can get inside to put a nut there and hold it while i screw the bolt in...

i think i am going to go with schmanmans piston idea.. it will be a hassle but i am going to do it..it seems easier anyway
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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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Unread postAuthor: noname » Sun Jun 24, 2007 12:19 pm

You have 841 posts and you don't know how to put some bolts in an end cap?
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Unread postAuthor: VH_man » Sun Jun 24, 2007 12:23 pm

hes saying that he might have trouble holding the nut down while he screws the bolt in..........

basically, he needs 3 hands to make it work.
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Unread postAuthor: Gepard » Sun Jun 24, 2007 12:28 pm

Epoxy the nuts in.

Want us to build it for you? :D

Michael
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Unread postAuthor: iPaintball » Sun Jun 24, 2007 12:33 pm

just use a femal adapter and a threaded bushing as an endcap.
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CO2 tank hybrid: Gotta fix the meter :(
Cane gun: Needs a pilot/fill setup
1.5" piston valve gun: Almost done
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Unread postAuthor: spudthug » Sun Jun 24, 2007 12:33 pm

[sarcastic] yea gepard thats smart!!! i am going to epoxy bolts in that i am goign to need to take out to service the piston! yes ill do that! [/sarcastic]

@ noname i ment it is impossible to put bolts in like that because i cant hold the bolts on the other side...it will be blocked off...

@ da pneu kid- can i get threaded bushings anywhere other than mcmaster? i havent seen them anywhere but there.. i might have to order off of there..unless ur talking about metal...that would be pretty damn heavy..i think i am jsut going with schmanmans piston idea
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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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Unread postAuthor: Gepard » Sun Jun 24, 2007 12:47 pm

Hey - I didn't say that! I said the nuts!!!

Michael
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Unread postAuthor: goathunter » Sun Jun 24, 2007 1:20 pm

Spudthug, you use screws not nuts and bolts.Try some 3/4"long #10 Stainless sheet metal screws(make sure to drill pilot holes).This should cure your plug issues.But you will need an O-ring groove somewhere in there to stop the leaking.
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Unread postAuthor: noname » Sun Jun 24, 2007 5:15 pm

Bolts would work fine without nuts on the other side, just tap the holes correctly and the bolt's threads will hold it in. If not, use machine screws.
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