Help with a mini piston coax

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SpudFiles Forum Index » Mini Discussion » Help with a mini piston coax

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Help with a mini piston coax

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brplatz

Posted: 05/05/2008 19:53 PM Post subject:

Staff Sergeant

Joined: 21 Mar 2008
Posts: 124
256.94 Spud Bux

ok cool i have seen the tutorial or something on how to make one of those so i think i will have to make one. but i still dont think this pvc will hold 300 psi or more.

Sticky_Tape

Posted: 05/05/2008 19:59 PM Post subject:

Colonel

Joined: 31 Jan 2008
Posts: 559
663.31 Spud Bux

Did you look at the edit in my post that stated to use those pressures?
I also said to make one out of copper.

brplatz

Posted: 05/05/2008 20:23 PM Post subject:

Staff Sergeant

Joined: 21 Mar 2008
Posts: 124
256.94 Spud Bux

ok cool i just saw the edit lol

i just missed it lol.

i have some steel in the garage, maybe that will work?

kablooie

Posted: 05/05/2008 20:49 PM Post subject:

Staff Sergeant

Joined: 18 Feb 2007
Posts: 117
432.70 Spud Bux

I have a half inch coaxial that I recently made, and had trouble with the piston too. My solution was an epoxy piston with three layers of craft foam (see picture or goodle it) that I had lying around. It now seals at ~15 psi and the power is amazing (went through 4 coke cans). The foam is not the toughest stuff, and if you have a sharp barrel it will be shredded pretty quickly, but as a semi-short term solution it is totally worth it. Good luck!

http://www.guildcraftinc.com/images/products/full/353-867%20Foam%2012x 18%20Asst.jpg

FordGtMan

Posted: 05/05/2008 21:27 PM Post subject:

1st Lieutenant

Joined: 25 Oct 2007
Posts: 251
188.37 Spud Bux

the problem probably was that your barrel wasnt lined up perfectly and that screw hit the barrel instead the seal. happened to me twice. Sad

brplatz

Posted: 05/05/2008 22:30 PM Post subject:

Staff Sergeant

Joined: 21 Mar 2008
Posts: 124
256.94 Spud Bux

FordGTMan you were right. the second one i make i made it much better and it is lined up perfectly. now it seals and fires perfectly. except i have a leak and cant find and epoxy. Very Happy

FordGtMan

Posted: 05/05/2008 22:40 PM Post subject:

1st Lieutenant

Joined: 25 Oct 2007
Posts: 251
188.37 Spud Bux

put it in some water. you can easily spot it then Smile

OuchProgramme

Posted: 05/05/2008 22:50 PM Post subject:

Major

Joined: 12 Jan 2008
Posts: 374
534.55 Spud Bux

brplatz wrote:

i have some steel in the garage, maybe that will work?

Most definately.

High pressure co-axel

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