coax handgun

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
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ilovefire
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Fri Aug 06, 2010 6:09 am

hey this is my second pneumatic, as far as i know it is an original design and have not seen anything like it before hope there isnt any good reason that no one has made one like this would like to know your concerns and or feedback, thanks

sorry about leaving lots out when i posted this hopefully now you can get a better picture of how it works now, still got some stuff to do one the grip befer i get a pic of the whole thing but hopefully i can do that today

[youtube][/youtube]
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P1140016.jpg
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sorry im not that good with computer stuff so i just drew it hope you can tell how it works now
sorry im not that good with computer stuff so i just drew it hope you can tell how it works now
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this is the finished gun with detachable copper stock
this is the finished gun with detachable copper stock
Last edited by ilovefire on Sat Aug 21, 2010 12:30 am, edited 6 times in total.
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maverik94
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Fri Aug 06, 2010 9:56 am

Nice! Is that your own type of pilot that you built there? I'm a lil confused. i see the schrader...but what is the pipe in front of it for?
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Give me a lever long enough, and a fulcrum on which to place it and I shall move the world.
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Current Project: None, I'm in Spudremission.
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urgle the danish cow
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Fri Aug 06, 2010 10:33 am

wow great job. what is the downward pipe for?
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jackssmirkingrevenge
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Fri Aug 06, 2010 10:34 am

As confused as the above posters, can we have a diagram of what the inner workings will look like?
hectmarr wrote:You have to make many weapons, because this field is long and short life
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dewey-1
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Fri Aug 06, 2010 10:52 am

I am assuming that is probably the chamber that has another Schrader valve on the bottom for fill purposes.

Need a better overall picture.
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jackssmirkingrevenge
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Fri Aug 06, 2010 10:53 am

dewey-1 wrote:I am assuming that is probably the chamber that has another Schrader valve on the bottom for fill purposes.
... but that would make the chamber behind the piston.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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dewey-1
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Fri Aug 06, 2010 11:26 am

Then may be it is just a structural support for it to fit on the handle?

Don't you like speculation and assumptions?
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Gippeto
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Fri Aug 06, 2010 11:49 am

You're going to solder the two pipes together? That makes the "downward pipe" the fill.

Excess pilot volume with a tiny pilot valve...might create an issue.
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jor2daje
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Fri Aug 06, 2010 12:22 pm

Maybe its a three way valve?
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qwerty
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Fri Aug 06, 2010 1:23 pm

I'm pretty sure it's just a tee like thing for the pilot.
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jor2daje
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Fri Aug 06, 2010 2:17 pm

well that possible but the idea got me thinking, I dunno if this is the design he is using but it could make for a fairly compact easy to build small calibre three way valve. If you you dont mind about a slight leak into the chamber this could be built with pretty much just telescoping brass tubing and one floating oring.

edit: added slightly better picture
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3way.png
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maverik94
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Sat Aug 07, 2010 7:35 pm

Aha. I understand how it works. very nice!
"You can't be friends with anyone if you aren't friends with yourself."
"I'd rather be hated for who I am, than loved for who I'm not." -André Gide
Give me a lever long enough, and a fulcrum on which to place it and I shall move the world.
–Archimedes
Defeat is always momentary.
–Carl Denham

Current Project: None, I'm in Spudremission.
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ilovefire
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Sun Aug 08, 2010 3:13 am

dose anyone know what would be the most psi something of this design could handle? thanks
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qwerty
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Sun Aug 08, 2010 5:34 am

It depends on what everything is made of and the quality of build. but by the looks of it maybe 400psi if you're lucky.
Last edited by qwerty on Sun Aug 08, 2010 12:23 pm, edited 1 time in total.
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ilovefire
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Sun Aug 08, 2010 5:47 am

qwerty wrote:It depends on what everything is made of and the quality of build. but buy the looks of it maybe 400psi if you're lucky.
thanks yea im just not to sure bout that fill tube connection (still not that sure how much punishment epoxy can take) but now you said that, when i get a shock pump it will make me feel a bit better about maybe 300psi (still much better than the 80psi i am limited to atm)
thanks :)
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