SpudFiles

I'm trying to build a dodgeball combustion cannon. Before I spend tons of money experimenting, I wanted to know if anyone had any advice (or links to a post that addresses the issues, since I couldn't find any).

I'm looking to launch 6" dodgeballs at targets (for a pirate themed game night) but not sure how to do that since I can't get pipe bigger than 6" for the chamber, meaning the chamber and barrel would be the same size. Can I just take a 6' length of 6" pvc and make the back half the combustion chamber, or is the reducer (that I see in every design) necessary so I would need to reduce it and then increase it back up?

Will a chamber that big be too difficult to get the right fuel to air ratio?

I'm trying to stick with combustion so I can keep the pirate cannon look rather than a pneumatic design. And I don't need it to go super fast, jus the length of a gym.

Any help or advice, or directing to the right sources or sites would be greatly helpful, I can't find anything anywhere. I find it hard to believe no one has tackled this before.

Thanks

it won't be difficult... but it will be extremely expensive. take a look at the basketball combustion cannon in the combustion showcase.

If you have the pipe already, it really won't be that bad. Find an economical way to cap one end and use a solid piece of pipe as your chamber and barrel. Using an arosol might be tricky to get right, but a propane metering system isn't hard to setup and is explained at length on here. A camber fan is something you should look into also, since your chamber is so large.

Hope this helps