Guess the pumpkin guys use butterfly with large springs or pneumatic cylinders to open them fast. I can’t find pictures of this. Anyone have any or done this?

What does the qev gain me over the sprinkler? Better flow? Faster opening?

Yes having the ball valve open does dump a bunch of air from the main tank on each shot.

I will take a look at the link

If I leave the ball valve open it does dump a bunch of air out of the main tank. Will take a look at that link.

why does every post need approval, wow!!

[/img][/img]Working on a cannon that needs to shoot foam stress balls 30’ at targets. I have found it takes about 60psi to propel the balls that far with my small secondary tank. Only have 30 seconds to get the most targets possible. Right now I have a 10 gallon tank at 100psi with a pressure regul...

Building a cannon, trying to get the most distance out of it. Projectile will be foam stress balls. My thought was to have 2 tanks, one would be fired when trigger is pulled, and then somewhere along the barrel there would be a switch that the ball would hit and would fire a second valve to the barr...