They say the sound of an incoming round is absolutely horrifying... <snip> all coming at you at about mach 2.5 There seems to be a a disjoint here - you can't hear something coming at you if it's supersonic. Yup, you'll be dead before you hear it. But people who heard them flying overhead said they...

Reason I asked was because I'm a huge BB fan, especially the Iowa's. I've visited the Missouri when it was brought to Pearl and the New Jersey just over the summer. Wish these beauties were still in comission! Hope they find a good home for Iowa soon... So back to the potato guns. I decided I'm goin...

Does it have to shoot potatos? haha

Also Starman, I see you're avatar is an Iowa class BB, are you a BB fan?

Reason I'm doing all this is I already have a potato gun but I wanted to rebuild it a bit, try to make it better. Right now it's way out of proportion, using a 6" diameter chamber that's around 1.5 feet long and a 2.5" diameter barrel that's 32" long. Looks like the chamber will be getting a big red...

Yup, just figured out the chamber vs. barrel volume math, pretty interesting article on it in spud files.

Looks like propane really is the way to go then.

I'll do the fan mod!

Thanks for the link, checking it out now!


Thanks man!

Haha, on other forums it's usually me saying that! I'm still digging around, kinda finding some answers..

Did some searcing on here and didn't exactly find all the answers I was looking for, so here goes. #1 My potato gun uses a 6" diameter chamber and a 2 1/2" diameter barrel. The barrel is 32" long, how to I figure out the correct chamber size? #2 Propane, MAP gas, or ether ethanol? Currently I use th...