annabelle

I use steel pipe for the barrel and acetylene for propellent..

mizzu

Years ago at a junkyard my buddy worked at, they had a couple of 55gal drums filled with surplus Renault pistons. We found out that they were a perfect fit inside 3" black iron pipe so we immediately built an Aceteylene cannon & quickly rained a barrel of these into a rival junkyard. A week later we got paid back with about 100 superballs falling from the sky. Funny then, but we could have caused some real damage.

BigBlue

I love potato guns. I used to have one till one day my buddy threw it in my bed and the striker broke. Guess it's time to build another one.

dodgezilla04

on mine, I have a 5' long barrell that is 2" diameter, and the combustion chamber is 18" long and 4" dia. I found it best to just put the potato in the end of the barrell, spray your hairspray, cap it, then ram the potato. it adds more oxygen to the equation and slightly compresses the mixture. fires with about 2 times the power that the regular way. whooo hoooo. gonna make a better one, as I used pvc.

mtl0727

i made that earlier this week i havent shot it yet

wannadiesel

Yep, I have one. Mine's PVC, 2" barrel, grill igniter with 2 spark gaps. Propane is my fuel of choice.

mtl0727, I think the chamber on yours is a little too big.

mikmaze

mine is burried in my trux tool box, along with a big bertha driver, best dang ramrod around......aquanet "all purpose" is my hairspray of choice, and the grill ignitor of course.... actually killed a rabbit with mine, bout a 25 yrd shot,, pesky varmint was in my garden, then outa no where , he was on my grill

dieselJon

Did ya have potato with that?

dodgezilla04

http://media.putfile.com/Snowman-VS-Potato-Gun

here's our potato gun in action against a snowman our kids made. you can here the 4 year old protesting, the 9 year old is taping and commentating.

Mglass1045

Screw potato guns(I like them, just never built one).......Pumpkin chunkin that's the next level!! Saw an air powered cannon shoot a pumpkin about 3/4 of a mile. That's just cool

JPR Ram

Here's the one we built at work with scap metal.

https://www.dieseltruckresource.com/...0&ppuser=49793

https://www.dieseltruckresource.com/...9&ppuser=49793

https://www.dieseltruckresource.com/...7&ppuser=49793

https://www.dieseltruckresource.com/...8&ppuser=49793

ofcmarc

The cheap 2 day old bread at the local grocery is lot of fun to shoot off at the neighbor near point blank range. Smoldering bread everywhere

H2SRDMB

http://www.23.org/photos/burrocanyon1/image5.htm

just a link to the pics page.. all i will say is. i will put a patatoe thru a 5/8 peice of plywood. and a door. and crack a cinderblock on the wall in the back yard. and i have no idea how far. but the backstop for the firing range was too steep to climb over


simple design, scuba tank, sprinkler sylanoid, 150 psi compressor. 2 9vlt batteries and a switch!

Buckshotram

Ive seen a walnut go through a 1x4 door on a barn we also use white rain and have a grill sparker.

phantom_ram

I haven't built one but after reading all of this its on my list of things to do!