so make piston

for my second cannon(gotta get around to posting my first) I can't figure out which type of valve to use. It's going to have a two inch barrel and a 2.5 in barrel, so it has to be powerful enough for both of them. And I have done my reserch and people have used sprinkler and piston valves. And if I ...

Yah my main ammo wil probly be darts pototoes other random crap I can fit down the barrel.

Thnx I would do this but I'd have to add a feed system on all of them and I'm to lazy to do that

I'm making my second cannon and it is going to be a magazine fed rifle. In the magazine will be pieces of pipe same size as barrel. But I'm notsure which size barrel 1" 1/2" or 3/4"

that's what I thought since you can buy bigger diameter abs than PVC at home depot

I am building an hho generator aka electrolisiser. I was wondering if I could use abs in this case. You know the black stuff at home depot. Thnx for the help

thanks for the answer I was thinking a modded valve too. Then I just got this idea but its a bit overkill. Have the piston piloted by a small piston thants piloted by ball valve/blowgun

I'm going to make a at4 coaxial with a 4 in chamber and a 2 in barrel. The piston seems like its going to be pretty big. I need some ideas on a 4 in piston and how to pilot it.(e.g. X" endcap with sprinkler valve pilot) thnx for the help.

what the specs of your cannon. i can run it thriugh my calculator for you

what fittings are that on the launcher and cartrige. looks like schrader

For a switch you can use a motion detector or you can look for my tripwire swith which is what I masking right now.

use my calculator if you live in the us.
http://www.instructables.com/id/co2-cal ... ur-spuddie

WTF your supposed to share your innovations. Other wise good cannon. Goodpaint job but again what the he'll is a slammer valve. Is it like a vertilcal piston or hammer valve???

just put two switchs in the handle. one momentary to fire the gun. then a push on push off button for the laser sight. easier to label if you want to and alot less expensive.