making a mini pneumatic

[jackssmirkingrevenge]

you can afford to have a smaller chamber, but if you keep those dimensions you should have a reasonably powerful cannon

[spud yeti]

does a paintball fit into 15mm pipe?! I dont think it does, but m&m's would work then i guess. Otherwise the progress sounds pretty good. How did you modify the ball valve though?

[spanerman]

it doesnt but they fit in 22mm with wadding

[dongfang]

Hi,

I think most people here would say the chamber is too large for the barrel. It's a 2.7:1 ratio.

Can you fix a long, strong spring to open the valve quickly? Or a torsion spring in some way? Then it might get quite good.

Regards
Soren

[jackssmirkingrevenge]

Can you fix a long, strong spring to open the valve quickly? Or a torsion spring in some way? Then it might get quite good.

Modding a sprinkler valve would be easier and mroe effective.