I use those reusable water baloon "splash bombs," like a spherical sponge. I put a 2 foot long vrack in my dad's 3/4" pine fence with one using an 8' burst disk pneumatic.

Why don't golf balls fit in your 2" barrel? Is it because of the foreign pipe measurements? Spuds remain to be my favorite ammo.

I don't think that recording the building process is entirely necessary. What exactly is the goal here, using the smallest number of points possible, or using under X number of points and whoever performs the best wins? If it is performance, you may have problems with verifying distances and ...

Love your website, keep up the good work. The list of chemical equivalents is a very good tool to have. Nice cannon. How about painting it flat black. Black looks good on everything.

It is very hard to make a spudgun that does not work. So I answered yes.

Or you can use Mr. Heater part #F273719<--I think That's it, not sure though. It is a regulator meant for propane and is very consistent.

I shoot mine in my backyard (in suburbs of Carlsbad, CA). The neighbors seem to think that the noise is me hitting golfballs.<--Not sure how that conclusion was reached. I need a better place to shoot as well.

Ignition will be a BBQ igniter for low mixes until I can convince my mom to let me get a stungun. Fuel will be metered into a 2"x12" reservoir then compressed to a 6x or so mix. An air regulator on the reservoir is attached to a tire chuck to administer fuel to the gun's schrader. A burst disk on ...

But it's a combustion, what would nitrogen do? Or are you messing with him?

This mini hybrid in progress has a galvanized steel chamber, aluminum cam locks, and an NPT spark plug. I have pneumatically tested it to 200psi with no leaks, sounds like a firearm when the disk blows. In the third picture, I have included a penny and a writing pen to give you an idea of scale :D ...