potato gun

[racerx]

Fire, Fire!


http://members.tripod.com/~food_godBB/fire.wav

 

[mxrider99]

Ima get video of mine later today...

 

[joecrawler]

Go pneumatic, and make your own barrel sealing piston valve. Just check out the diagrams and my gun. The gun below has a homemade piston valve and can send plaster slugs thru car doors, plywood, the side of my house ,and basically what ever you want.

The air escapes around the sides of the piston but seal off the barrel at the same time and the chamber is located off of the bottom of the tee.

Then this is the piston at the back leting the air go into the barrel. It moves by a vacuum effect from the air being let out from the charging valve located on a plug on the back of the tee.

Then my gun using the valve

And lastly the piston with the front sealing face removed to re-service it.

 

[wheelspinner]

ok thanks. i've already build a compressed air one and at 70 psi its fun and at 120 its insane. my friend on teh other hand is dead set on making a combution one but hasn't gotten it to work yet.

 

[Norcal crawler]

So, ive heard a lot of people making them, but how do they function? Do you have to fabricate anything or do you just throw a few pipes together and hook it up to compressed air? I've always wanted to make one. Also if anyone has any instructions then that would be great.

 

[davcom]

we always used 1 1/2 in pcv pipe and three inch sewer clean out trapp for a chamber. took fint coleman lantern starter and Purple aqua net worked best sounds like a 12ga going off

 

[KylePipkin]

heres one im working on right now. It will be about 12 1/2 feet long. In the first picture, I was gluing the air valve to the tank. The wood is just to hold the barrel up. It will not be a part of the cannon.

The valve

 

[joecrawler]

Man, that's basically what I was going to build next except not as complicated in the valve department. very nice cannon, and let me suggest the biggest golf ball barrel ever. Also might I suggest a breech on that gun or is it a screw in breech? Agian very nice cannon!

 

['83 chevy]

me and my friend built one before that used propane. we didnt use pvc tough, we used sch.120 steel pipe(5/8" wall)that we got from work. we had a 7" chamber and 2" barrel. this thing was INSANE!!! we tried tennis balls in it and it ended up exploding the balls. it was nuts

 

[joecrawler]

You should of made a Hybrid out of it.

 

[wheelspinner]

thanks everyone. my friend got his working and at 70 psi there pretty equal but anything higher i blow him away