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My first coaxial build file.

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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My first coaxial build file.

Unread postAuthor: Tom » Sun Oct 28, 2007 2:58 pm

In this topic I wil show you the progres of my first coaxial gun.
My plan is to make a simple coaxial from (pressure rated) PVC pipe, I´m building the gun for the performence not for the desgin :!: .

28/10/07
I made parts for the gun. Today I made the reducer for the barrel, made the endcap and made the piston.
The reducer is made drom black derlin rod, I machined it with a lathe and drillpres.
The piston was made out of 32mm PVC, two iron-rings, and a threaded rod. The sealing face was a big problem because I don+t have acces to soft rubber sheets :x . Then I found a beer bottle with a system that uses a neopreme washer to seal :idea: , I used this for my piston and it´s works :) .
Richt now I´m afraid that the gun wont work because the piston seals for 80%, so I think that when I pull the 1/4ball valve the piston won´t move :roll: Can this be a problem?

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Last edited by Tom on Sun Oct 28, 2007 3:19 pm, edited 2 times in total.
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Unread postAuthor: homedepotpro » Sun Oct 28, 2007 3:08 pm

people don't usually make build files for simple guns, do they? aren't build files usually for new concept builds. I might be wrong
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Unread postAuthor: Tom » Sun Oct 28, 2007 3:21 pm

Well maybe they are :D
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Unread postAuthor: homedepotpro » Sun Oct 28, 2007 3:24 pm

meh, your work space looks like mine
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Unread postAuthor: Tom » Sun Oct 28, 2007 3:27 pm

That is just the background, it looks very neat whem your standing in it. The picture was also token in the "crap corner" :D .
GR.Tom
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Unread postAuthor: LikimysCrotchus5 » Sun Oct 28, 2007 9:54 pm

You need to grease the piston and the the piston housing. Use white lithium grease, you can buy it from a hardware store. This will make the piston slide easily and still seal weel without O - rings.
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