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Copper coaxial idea

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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Copper coaxial idea

Unread postAuthor: Gun Freak » Sat Feb 13, 2010 10:24 am

I got his idea from another cannon I saw on the forum... Its a coaxial piston valve with a 1/2" chamber and probanly a 1/4" barrel. I am wondering if the chamber should be as long as the barrel or if it should stop halfway? Thanks :)
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Unread postAuthor: Gippeto » Sat Feb 13, 2010 10:44 am

Run it through ggdt. See what YOU think. :)
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Unread postAuthor: Gun Freak » Sat Feb 13, 2010 10:54 pm

GGDT won't work on my computer.
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Unread postAuthor: Heimo » Sun Feb 14, 2010 4:48 am

Gun Freak wrote:GGDT won't work on my computer.
If you are running windows 7 like me it gives a error message if you try to run it, but if you run it in compatibility mode for windows xp it works fine
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Unread postAuthor: tghhs » Sun Feb 14, 2010 5:57 am

Heimo wrote:
Gun Freak wrote:GGDT won't work on my computer.
If you are running windows 7 like me it gives a error message if you try to run it, but if you run it in compatibility mode for windows xp it works fine


I second this! Man took me a while though to find out for my self.
It wasn't anything like this was it?
http://img16.imageshack.us/gal.php?g=30092009816.jpg
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Unread postAuthor: chinnerz » Sun Feb 14, 2010 6:22 am

tghhs wrote:I second this! Man took me a while though to find out for my self.
It wasn't anything like this was it?
http://img16.imageshack.us/gal.php?g=30092009816.jpg


hey mate next time try using the DIRECT LINK feature of image shack. (Not trying to insult or anything, just a bit of advice. Because the link you have provided leads me to an album with 7 pictures in it, and I don’t think any of them are the one which you wanted to display.)

P.S. you may as well just paste the forums link, then it will display the picture in this page. you are looking for forum link type 1
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Unread postAuthor: Gun Freak » Sun Feb 14, 2010 9:52 am

I got the same message from W2k and Windows 7. So you're saying I can't run it?
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Unread postAuthor: Heimo » Sun Feb 14, 2010 12:10 pm

Gun Freak wrote:I got the same message from W2k and Windows 7. So you're saying I can't run it?


What is the exact message it gives you ?
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Unread postAuthor: Gun Freak » Sun Feb 14, 2010 1:27 pm

It looks like this:
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