LP pneumatics - ram exhaust hole size

[Danjr1]

In regards to Flow, I wouldn't know enough about it to comment and a little confused as to why it was mentioned in the first place?! lol

Anyway, the only part I have at the moment is a SMC CDQ2B80-40D double acting cylinder (80mm bore, 40mm stoke). Bought it from ebay a couple of years ago for £20. Could have sworn it was 50mm stroke but its nice, compact and should give a decent kick.

The valve would be a simple 12v valve along these lines (http://www.aliexpress.com/item/Free-...986222776.html). Cheap and heavy but should do the job with a decent straight-through flow.

Two 12oz paintball tanks with one as the buffer and a paintball regulator. Assembly would involve attaching the valve directly to the cylinder using a simple "T" shape plumbing arrangement to attach the tanks. Then a small ball valve as a dump and PRV. Return would be via a bungee and the aforementioned drilled hole.

This is purely theoretical at the moment but my aim is a for cheap, simple, compact and reliable flipper that has plenty of shots.