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piston problem

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: mopherman » Wed Apr 25, 2007 7:27 pm

the problem is that im completly broke so im looking for a cheap alternative
also my piston is only 1 inch. and im gonna lube the hell out of it
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Unread postAuthor: spudthug » Wed Apr 25, 2007 7:34 pm

only 1 inch? u cant actuate a 1 inch psiton with a blowgun unless it is extremely well machined..not im not saying that u made a bad one i jsut dont like it when i had the same problem and i helped so many people with it yet u wont listen to me still...
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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: mopherman » Wed Apr 25, 2007 7:39 pm

from what i recall, you were somewhat reluctant to buy new and expencive parts for your cannon. also i just looked at some of the piston cannons here and one in three was actuated by a blowgun. i appreciate your help, but im dead out of money.
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Unread postAuthor: spudthug » Wed Apr 25, 2007 7:48 pm

from what i recall, you were somewhat reluctant to buy new and expencive parts for your cannon


for waht cannon...if ur talking about my comp gun i spent 200 dollars jsut on the copepr for it....so??


also i just looked at some of the piston cannons here and one in three was actuated by a blowgun


as i said they are either small or well machined...urs is hotglue....
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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: mopherman » Wed Apr 25, 2007 7:53 pm

spudthug wrote:
from what i recall, you were somewhat reluctant to buy new and expencive parts for your cannon


for waht cannon...if ur talking about my comp gun i spent 200 dollars jsut on the copepr for it....so??


also i just looked at some of the piston cannons here and one in three was actuated by a blowgun


as i said they are either small or well machined...urs is hotglue....


was 200$ realy worth it for a 100$ prize? i dont mean to be stubborn, im just trying to save money( of witch i have none) and asthetic value. If you dont want to help me you dont have to.
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Unread postAuthor: spudthug » Wed Apr 25, 2007 7:58 pm

yes i want to help u because i know how frustrating it is building a first psiton i was there..u should look at my threads i was practically blowing up..and this wasnt jsut for the comp..i could care less about entering it there u should see how effing fun huge ass guns are...i jsut sit there and shove barbie dolls in my barrel jsut to see them blwo up....i got p od because of someone else i was helping with a psiton...all along form his first day i was telling him his pilot was the problem and he wouldnt listen he kept saying no no no...and then finally a few weeks later he decided to see if i was right about the pilot...guess what he slapped on a new pilot and it worked like a charm...better than he expected also...before criticizing me u should really go by ur self a 3 dollar 1/4 ball valve...


^^^ignore spelling mythbusters is on in 2 mins and i wanted to watch it...had to type fast..bye!
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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: mopherman » Wed Apr 25, 2007 8:00 pm

i suppose your talking about demilus? he was cool but the washer handle on the sprinkler looked like crap
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Unread postAuthor: spudthug » Wed Apr 25, 2007 8:04 pm

yes i am..i coudlnt remember his name...did u read the whole thing? i told him on page one that he needed a bigger port...u should jsut try it...well im goign to watch myth busters c u guys in the morning
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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: mopherman » Wed Apr 25, 2007 8:07 pm

sweet ninjas on mythbusters!
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Unread postAuthor: pyromaniac » Wed Apr 25, 2007 9:57 pm

mopherman wrote:sweet ninjas on mythbusters!


i laughed so hard when he ran over the flour or whtever. also when they cut a chunk out of the hand.
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Unread postAuthor: chaos » Thu Apr 26, 2007 3:35 am

spudthug wrote:only 1 inch? u cant actuate a 1 inch psiton with a blowgun unless it is extremely well machined..not im not saying that u made a bad one i jsut dont like it when i had the same problem and i helped so many people with it yet u wont listen to me still...


sorry but i must say my gun is a 1" piston and its actuated by a blowgun. it does work but you need the back end of the piston sealed for it to pilot properly.
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Unread postAuthor: spudthug » Thu Apr 26, 2007 5:36 am

unless it is extremely well machined



urs is good though and it isnt a solid piston right? it is a bolt piston or whatever u wanna call it...
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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: chaos » Thu Apr 26, 2007 6:29 am

yer lol i dont kno the name of them rely but yer you could say its a bolt piston, its not machined at all i just have two rubber washers, cut with some pipe and hole punched put on a bolt with a eq hole down the middle ill get piccies up of it when i put mi newly arrived dot scope. but i suppose for a first time build go with a ball valve or sprinkler.
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Unread postAuthor: AmYisroelChai » Thu Apr 26, 2007 1:37 pm

spudthug wrote:dude that still wont work...use a ball valve before anything..just hook up a 1/4 ball valve...it will work if u can move the piston with your mouth..i keepo telling everyone that is having problems to do this yet they wont listen...


A ball valve would be great but it make firing the Cannon whole handed you cant pull the trigger with your finger like a Blowgun. This creates a problem when you are trying to use it in a scenario game in Paintball and your hands are busy.

I would put a Sprinkler valve to port but a modded-Blowgun is $7 total a modded sprinkler valve is closer to $20+.

I was looking to make like 10 -20 bazooka's so each $ spent counts allot.

I can put the ball valve but that makes the porting a bit awkward -any advice?
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Unread postAuthor: pyromaniac » Thu Apr 26, 2007 3:29 pm

Also i know hes basicly doing this to see if he can make a a piston.

So his cannon is only like a 1 inch chamber and a 1/2 inch barrel. It won't be a huge loss if it doesnt work.
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