piston surface area?

[mopherman]

I know i probably should know this, but does anybody know how much available surface area a piston has to have for it to actuate? I only have 1/8 of an inch of extra space in a launcher I'm planning and that worries me
thanks

[jackssmirkingrevenge]

The bigger the available area (total piston area - barrel inner diameter) the better, however if your piston is a tight fit, you keep your pilot volume to a minimum and use a good pilot valve, there's no reason why it shouldn't work.

[rna_duelers]

should work fine,alot of BTB cannons use a piston that has nearly no surface area left over and boogieman made one that worked and it had no surface area that was extra,until the piston met its end.

Mr Wilson my GB cannon only has maybe 4mm either side if the piston and it works great.Nothing to worry about.

[RDX,]

its only a good thing if there is not much surface area ,my new GB cannon has piston that is 55mm diameter and my seat is 52mm and works great

[Biopyro]

I have a problematic (unfired) piston valve which has very little surface area. I haven't yet worked out if the problems are due to the polymorph piston IU am using, or the extremely low surface area. Has anyone else used polymorph for a piston?