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co-axial questions

Posted: Sat May 26, 2007 11:40 am
by super spuder
well i am about to make my first co-axial, but i have a few questions first

#1 how far away from the barrel should the piston be when it is fully back?

#2 does the piston need to be completely sealed all the way around, cause i have a really nice hot glue piston, but it has a small leak around the side, could this work as an equalization hole?

i may have more latter, but that is all for now.

Re: co-axial questions

Posted: Sat May 26, 2007 11:43 am
by jackssmirkingrevenge
super spuder wrote:#1 how far away from the barrel should the piston be when it is fully back?
1/4th of the barrel diameter
#2 does the piston need to be completely sealed all the way around, cause i have a really nice hot glue piston, but it has a small leak around the side, could this work as an equalization hole?
if it's a small leak than the flow of your pilot valve then it should work

Posted: Sat May 26, 2007 1:02 pm
by Velocity
1/4 is required for maximum flow. If I were you, I would step it up to 3/8 or 1/2, just because it can be difficult to get exactly 1/4, and if you do less, you lose power and flow.

Posted: Sat May 26, 2007 1:20 pm
by mopherman
I too am making a coaxial and my piston keeps tumbling. i want to make a new piston, but do you think i could use a pad of duct tape for a sealing face? I heard someplace that as long as it has "give" it will work ok.

Posted: Sat May 26, 2007 8:47 pm
by super spuder
use the rubber from an iner tube

Posted: Sat May 26, 2007 8:59 pm
by VH_man
use that craft foam stuff you buy in miachels. works fine for me. just have to duble/triple it up so it doesnt burst.