Found a 2" slide in Female threaded output and a plug :O so im going to make it a mortar/booby trap for airsoft workin out some numbers in HGDT now Should have some photos up tomorrow. First cannon
EDIT: sorry meant to add to the other post
Edit 2: Photos
2" sch 80 Pipe with a Male plug in the bottom
I have been looking around but i'm not sure how I can fuel this in the field. I'm actually not sure how i'm going to fuel it at all, i was thinking of syringe but i'm not sure how i would close the small hole i would put in it to fuel it.
EDIT 3: Not sure what type of ammo to use. I was thinking of a wad with bb's but i also was thinking of a tennis ball (then relized it wouldn't fit) Would duct tape ball's be to hard to use as indirect fire, or should i keep searching.
EDIT 4: Test fired today, no ignition so I'll have to pick up a syring and do some metering (I was testing spray and pray to see noise output). I used HGDT to figure 37.7 cubic inches for a chamber, with 4% fuel. This came out to 24.71ml of fuel needed if anyone can double check my math.