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co2 bering gun

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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co2 bering gun

Unread postAuthor: maggotman » Fri Jan 02, 2009 8:17 pm

its got an 8mm internal diameter barrel the chamber is the small space between the ball valve and the sprinkler valve in scred into the ball valve is a 30kpsi fitting withc has got a nail jammed in it to pierce the co2 cartage when it is screwed in. i can get about i have had 30 shots out of the 33gram cartage you barleay need to open the ball valve if u open it to fast it honks I have fired a 7mm ish bb 10 mm into a solid bit of hard pine it will go straght
thro 7 coke cans in a line i dient have any more to test it with

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i would imagen this thing fires at about 50 bar
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Unread postAuthor: spudtyrrant » Fri Jan 02, 2009 9:17 pm

nice cannon, i 'm glad i am the first to comment i was wondering how you had the nail positioned in the fitting. ps: you should add a single shot barrel just for fun and record the fps :twisted:
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Unread postAuthor: VH_man » Fri Jan 02, 2009 9:46 pm

looks like fun :-D

Now make it so reloading the bearing and opening up the Valve is done with one lever.......

Dreams aside, I like it. Functional. Although I don't trust either that "sprinkler" (yes I know its metal) or the blowgun. I'm surprised they're holding up for you actually.....
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Unread postAuthor: maggotman » Fri Jan 02, 2009 9:55 pm

it is single shot relay unless i agged a mag i will up load som detail pictures of how i made the co2 adapter
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Unread postAuthor: Carlman » Sun Jan 04, 2009 10:16 am

make sure you open the bv while the barrel faces up other wise youll be dealing with liquid co2..
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Unread postAuthor: maggotman » Sun Jan 04, 2009 10:23 am

dident somone make a breech with a balll valve on here ? how did it work ?
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Unread postAuthor: Carlman » Sun Jan 04, 2009 10:28 am

1) get bv
2) get drill
3) drill hole in side of bv
4) chug back a corona
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Unread postAuthor: trae08 » Mon Feb 02, 2009 2:23 pm

i have a question. You say it runs at 50 bar right? so how does the sprinkler valve work then? most have a diaphragm which at 50 bar would rip. Actually it would rip around 13 bar. wouldn't make it close to 50. so are the internals of that valve different then most?
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Unread postAuthor: maggotman » Mon Feb 02, 2009 5:42 pm

i dont no i have had the valve at 1000psi i dose use a diaphragm i might take pictures of the valve. I don't have this gun anymore when i ran out of co2 i took it apart for parts
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Unread postAuthor: Hotwired » Mon Feb 02, 2009 6:18 pm

A QEV piston/diaphragm isn't expected to be alive at 850psi either. However it has been done.

The valve looks identical to every other inline diaphragm valve, it's just made of brass and not plastic.

I'm just surprised the blowgun with such a short lever could be pulled at that pressure ^^
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Unread postAuthor: maggotman » Mon Feb 02, 2009 6:34 pm

When filling the you could see the lever being pushed out by the pressure it was not much harder to pull as well.
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Last edited by maggotman on Mon Feb 02, 2009 7:44 pm, edited 1 time in total.

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Unread postAuthor: Lentamentalisk » Mon Feb 02, 2009 7:42 pm

It operates at 56 bar, as you are using unregulated CO2. I highly suggest that you never use any compressed gas whose pressure you don't know, or you will end up only half the man you used to be.

maggotman wrote:When filling the you could see the lever being pushed out by the pressure if was not much harder to pull as well.


What does that even mean?
Please write in English.
Please punctuate in English.
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Unread postAuthor: SpudsMcGee » Mon Feb 02, 2009 7:52 pm

Cool cannon... I think. Yeah...
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Unread postAuthor: maggotman » Mon Feb 02, 2009 7:53 pm

Lentamentalisk wrote:It operates at 56 bar, as you are using unregulated CO2. I highly suggest that you never use any compressed gas whose pressure you don't know, or you will end up only half the man you used to be.


How can you say that co2 changes pressure with temperature. :? :?:

And i also think that now the post is locked about my spelling it is being transfered into my posts, yes i put a f instead of a t but i corrected it soon after get over it.
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Unread postAuthor: Hotwired » Mon Feb 02, 2009 8:02 pm

It's just best to have all punctuation and so on in first time round.

e.g.

Code: Select all
How can you say that co2 changes pressure with temperature.


Well that reads like a question asking why someone is saying that CO2 changes pressure with temperature.

But...

Code: Select all
How can you say that? CO2 changes pressure with temperature.


It's now saying the opposite: that you know CO2 changes pressure with temperature and what is he on about.
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