First Cannon 200 psi Ball Valve

[Flindo Jimbori]

This is my first cannon. It is made of 1.5 inch schedule 40 PVC and a ball valve. It fires golf ball cores (see images) nicely, but not much else fits in the barrel. I would like suggestions in the comments please.
I also modified a few golf ball cores for a more bad*** projectile.
Pictures were too large, so I hosted from Facebook.

[jackssmirkingrevenge]

Nice first build, your weak point is the ball valve though. As it is, it cannot be opened fast enough to give full power potential, or any measure of accuracy. A sprinkler valve is a better idea.

[Flindo Jimbori]

Yeah, the ball valve also decreases my accuracy because when I twist it it jerks the gun. My next cannon will have a sprinkler valve or a QEV. Any ideas for 1.5" projectiles?

[jackssmirkingrevenge]

Whatever fits in the barrel

[1nxtmonster]

Projectiles... i made a pretty wicked 1.5 projectile for my burst disk cannon. I cut in half one of those little hollow plastic training golf balls, filled it with hot glue, let it dry and popped it out. Then, using a hole saw, I cut out a foam body that the warhead went on , and a milk lid for an airtight barrel sabot.

[Flindo Jimbori]

Projectiles... i made a pretty wicked 1.5 projectile for my burst disk cannon. I cut in half one of those little hollow plastic training golf balls, filled it with hot glue, let it dry and popped it out. Then, using a hole saw, I cut out a foam body that the warhead went on , and a milk lid for an airtight barrel sabot.

Interesting. I'd like to see a picture if possible. I also found that 5 hour energy bottles work well, but there is a small gap around the sides, so I may wrap it with duct tape until it fits better.

[jackssmirkingrevenge]

I also found that 5 hour energy bottles work well, but there is a small gap around the sides, so I may wrap it with duct tape until it fits better.

Once you do that, you can cut the bottle in half and use it as a sabot cup for more hardcore projectiles.