Boomer58cal wrote:I have copious amounts of 3 inch schedule 40. Maybe a 4" Tee reduced to 3" for the barrel. Figure I could use the 3" tennis balls I use in my larger pneumatic if I wanted to launch something.
Thanks by the way, for the heads up on the 3-inch tennis balls. I didn't even know they existed until I saw you were using the Chuckit! balls.
Burst disk... http://www.spudfiles.com/spud_wiki/index.php?title=Burst_disk Wikispud can explain better than I can.
I use foil inside a union.
You are right with the blast disk! Im not doing it quite like this, sealing it as good. I traced around the inside of the muzzle on a few of mine and cut a small foam core poster board disks and this works GREAT!
It holds in the gas and gives just enough pressure to let the crack really build up and the disk doesnt fly very far away making it easy to retrieve. The tennis balls are hit and miss on where they will land and being a $1. a ball ive lost about 5 of them now.
Wait till you see my latest. Im just now finishing up a trilogy of cannons, ill get a picture when i get the last one finished.
Finished, going to give it over night to cure before i give it first test. Im going to start off with 2/3 tsp of carbide and that full jug of water. The little one has a very sharp crack to it, it seems very finiky on the carbide amount. The 4" original thunder mug is the all around best, it will rival an M80 many think this is what it is.
Everyone seems to like the brushed metal finish so i went with that again. I bought a huge roll of it off amazon ive used every bit of the roll on these cannons.
This is going to be a fun 4th, if i survive ill post back