Thanks McCrowley

I have been considering the Piston valve above all because I am trying to get the best range possible. I am just hoping that the ammo I use will reach a terminal velocity less than 300fps on the way down. It would be awesome if I could reach every corner of the field. I also have an idea for a coaxi...

Thanks a lot yall.

I'm not stupid. I already searched everything I could think of. And I kept coming up with thousands of posts that have nothing to do with what I am trying to find.

I need a valve that can be repeatedly used and quickly.

What design tools do you all use for the graphic schematics. I know MS paint is one, but what about the animated ones?

What would be the best valve for a large caliber cannon/mortar.
I want to build a cannon or mortar for paintball with a 2.5-3" bore, but I cannot decide what the best valve design to go with: co-axial, QEV, etc?

I have Windows Vista and I downloaded the GGDT and when I try to run it it says a file can not be found. Does it not work with Vista?

Thanks for the replies. As far as noise goes the louder the better. I intend for it to be very intimidating. On the GGDT I was getting about 1.3:1 I believe. For some reason I cannot get the program to work on my Vista laptop, but it does work on the XP desktop. I plan on giving this thing a nasty p...

Hey everyone this is my first post. I am not new to the spudding community, but I have only built one air cannon prior to my planned project. I would like to build a coaxial cannon for use as a paintball mortar. I would like to use a 5"-6" dia. chamber with a 3" barrel. I was thinking about a 3'-4' ...