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Counterstriker's Teeny Tiny Gun log.

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: frankrede » Fri Jul 25, 2008 1:05 pm

Counterstriker wrote:Dang... I was thinking that design over with the 4.5 barrel and 1/2 tank and found out it won't work on the scale I wanted.. I wanted one that I could actuate with the schrader valve, But I don't think it'll work with a 1/2 tank, I was aiming for a Smaller cannon anyway, I didn't want the pilot to standout to much on it, so I don't want to use a ball valve. Any Ideas?
You can actuate it with a 1/2" barrel, anything bigger might even be too much.
You just have to have a piston that fits almost perfect.
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Unread postAuthor: Sticky_Tape » Fri Jul 25, 2008 1:11 pm

noob of noobs wrote:Maybe you could try to make your own schrader valve. Gipetto's Easy Shockpump how to has a 3/4" version, and I've just made a 1/2" version of it using copper. You could open it mannualy just by pushing it open (if you can press it down hard enough) to pilot your gun. And since you seem to be able to "unsolder" copper pipe pretty easy, it would be servicable without threads.
Also, you could:
-Chop off a blowgun's barrel so it's shorter
-Maybe use a pop-off valve
-Drill out a schrader for better flow?

I know I've seen piston valves that pilot on just a schrader; for some reason my 2" piston valve did this once :shock: (It had sucky power though :wink: ) I'd give the schrader a go.

For the sealing face, I recently found these little washers at Home Depot that are metal with a neoprene face on one end. I recently upgraded my piston valve with one of these, and it seals great!

Have you ever made a epoxy casting if you did you would know that taking a blowtorch to it ruins it don't use solder then a epoxy casting is present use epoxy.
Counterstriker wrote:
Dang... I was thinking that design over with the 4.5 barrel and 1/2 tank and found out it won't work on the scale I wanted.. I wanted one that I could actuate with the schrader valve, But I don't think it'll work with a 1/2 tank, I was aiming for a Smaller cannon anyway, I didn't want the pilot to standout to much on it, so I don't want to use a ball valve. Any Ideas?
You can actuate it with a 1/2" barrel, anything bigger might even be too much.
You just have to have a piston that fits almost perfect.

I have a half inch CHAMBER on my Marker Gun and it works I find if you have a slightly loose fitting piston than smearing on a thick cote of vaseline makes i work for a while until you need to put on more. another reason why you should make it servicable.
You can use a shrader to pilot the piston just make the pilot volume small and adjustable... by making it servicable. I trashed mmy first marker gun due to not being serviceable BTW you don't have to use a male and female fitting you could use a union too.
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Last edited by Sticky_Tape on Fri Jul 25, 2008 1:26 pm, edited 1 time in total.
You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Unread postAuthor: Counterstriker » Fri Jul 25, 2008 1:22 pm

frankrede wrote:
Counterstriker wrote:Dang... I was thinking that design over with the 4.5 barrel and 1/2 tank and found out it won't work on the scale I wanted.. I wanted one that I could actuate with the schrader valve, But I don't think it'll work with a 1/2 tank, I was aiming for a Smaller cannon anyway, I didn't want the pilot to standout to much on it, so I don't want to use a ball valve. Any Ideas?
You can actuate it with a 1/2" barrel, anything bigger might even be too much.
You just have to have a piston that fits almost perfect.


Not barrel, Chamber, It's a Coaxial so all of you know.
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Unread postAuthor: noob of noobs » Fri Jul 25, 2008 4:42 pm

Sticky_Tape wrote:Have you ever made a epoxy casting if you did you would know that taking a blowtorch to it ruins it don't use solder then a epoxy casting is present use epoxy.


Well, I haven't used epoxy in it (I'm terrible with the stuff) so I used gorilla glue. But yeah, that probably won't stand up to a blowtorch either come to think of it :( . Could try squishing bike tube between it or silicon sealant...

Anyway, thanks.
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Last edited by noob of noobs on Fri Jul 25, 2008 4:48 pm, edited 1 time in total.
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Unread postAuthor: Sticky_Tape » Fri Jul 25, 2008 4:47 pm

[quote=''noob of noobs'']Could try squishing bike tube between it or silicon sealant...

Anyway, thanks.
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Question mark, question mark, question mark.
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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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