Cap piston questions and build log

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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clemsonguy1125
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After seeing Gippetos piston valve I decided to make one similair. I bought the tee and bushings but as I started to assemble it I relized that the cap wont fit and have room to slide. Also is it ok to put the screws on the outside of the plastic plate on the bushing.(pic included)
Heres a link to Gippetos gun.
http://www.spudfiles.com/forums/my-firs ... 12796.html
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As you can see there wont be room for the cap to slide
As you can see there wont be room for the cap to slide
reize 2.jpg
Gippetos Diagram
Gippetos Diagram
t_piston_valve_111.jpg (12.38 KiB) Viewed 3624 times
Last edited by clemsonguy1125 on Thu Apr 22, 2010 4:14 pm, edited 1 time in total.
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Gun Freak
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You can go down to one inch with the guide... that would only leave room for a 1" barrel though.
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clemsonguy1125
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maybe trim down the bushif it ok for me to screw the screws in the front
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Gun Freak
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I dont understand the way you're gonna do the screws. they have to go into the bushing and the tee.
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clemsonguy1125
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On bushings halfways into it theres a layer of pvc, my question is it ok to put the screws in front of them, where you can see them from the outside.
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Gun Freak
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I still don't get it
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clemsonguy1125
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I got it so fit but the flow is not going to be great.
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Gun Freak
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What kind of cap is that? Your pics are a little blurry. Is it all glued yet?
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clemsonguy1125
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No its not glued, its part of a 1 1/4 inch cap
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Gun Freak
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clemsonguy1125 wrote:No its not glued, its part of a 1 1/4 inch cap
Oh... that's a 2", right? and there's only like a half inch of opening so it's D/4, so it's ok I guess. I don't know if it will be good for a golf ball gun... is that what you're making? Are you going to epoxy the rubber gasket on it? Are you going to lower the pilot volume?
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clemsonguy1125
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Yes, no im going to bolt it on, and yes I only want 200 yard ranges at 60 psi so Ill be fine
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Gun Freak
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Yeah that seems doable. you putting a bushing on the bottom or no? Striaght to the chamber?
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clemsonguy1125
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what, the bushing holds th cap piston assemble at the back, the bottom holds a elbow to the chamber
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Gun Freak
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clemsonguy1125 wrote:what, the bushing holds th cap piston assemble at the back, the bottom holds a elbow to the chamber
I know that but I was wondering if you were going to put a bushing at the bottom of it so you can detach it from the chamber if you wanted to.
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clemsonguy1125
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Heres some updates
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