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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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Unread postAuthor: Ragnarok » Tue Dec 16, 2008 4:22 pm

Not all mini fridges (and usually not the cheap ones) use the same mech. Even if they do, the compressors are usually slower.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: sputnick » Tue Dec 16, 2008 4:24 pm

slower really isnt an issue for me, so much as attainable pressure, if it can get up to 400 psi, I dont really mind if it takes 2 minutes, especially since I would only trust 400 psi in more compact cannons, which dont take much to fill.
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Unread postAuthor: john bunsenburner » Tue Dec 16, 2008 4:38 pm

Excuse my dumb question but could some on explain how the valve used here works, I never heard of it and it come how caught my attention?
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Unread postAuthor: sputnick » Tue Dec 16, 2008 4:42 pm

It's a piston, N'est pas? just smaller...
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Unread postAuthor: john bunsenburner » Tue Dec 16, 2008 4:56 pm

je ne sais pas, mes moi j'aime les chause compact et fort. By all means there are few languages you will know that i will not(though my french grammer is fairly bad) I am not sure of what it is but it seems compact and relatively strong, two attributes i really like when it comes to valves(strong being fast and having a low opening time)
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Unread postAuthor: sputnick » Tue Dec 16, 2008 5:00 pm

Well to me, it definitely looks like a piston, whether it was purchased or constructed, if you look at that diagram somewhere on this site about the diferent kinds of pistons, it looks very similar in design to one of them.
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Unread postAuthor: john bunsenburner » Tue Dec 16, 2008 5:05 pm

He him self calls it a push botton valve...
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Unread postAuthor: sputnick » Tue Dec 16, 2008 5:35 pm

Oh your refereing to the thing at the end of the narrow tube! oh ok, I dent know what that is either, but like he says, pushbutton. I don't know, it looks expensive. I think its just basically a blowgun valve, just fancier :wink:
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Unread postAuthor: twizi » Tue Dec 16, 2008 5:57 pm

can a normal blowgun valve from kolbolt handle 900 psi :?

and if so would it be really hard to push down
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Unread postAuthor: sputnick » Tue Dec 16, 2008 5:59 pm

what is a kolbolt? just regular blowgun valves, I do not know if they would handle 900 psi, but supposing they could, it wouldn't be hard to push down, the pressure isn't pushing against the button...
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Unread postAuthor: twizi » Tue Dec 16, 2008 6:09 pm

sorry i meant kobalt i have a ton around here
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Unread postAuthor: john bunsenburner » Wed Dec 17, 2008 11:50 am

I still have no clue what the hell a push button valve is :?
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Unread postAuthor: Ragnarok » Wed Dec 17, 2008 12:02 pm

john bunsenburner wrote:I still have no clue what the hell a push button valve is

Exactly what it says on the tin. A valve that is opened (or closed, depends on model) by the push of a button.
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Unread postAuthor: ALIHISGREAT » Wed Dec 17, 2008 12:02 pm

john bunsenburner wrote:I still have no clue what the hell a push button valve is :?


well you see... its a valve... and you push the button to make air flow through it :roll: just think of it as a mini-blowgun (i suspect it works in much the same way anyway)
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Unread postAuthor: john bunsenburner » Wed Dec 17, 2008 1:50 pm

So it is a button operated blowgun valve? Or is there more to it?
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