dyi, i have been intersted in this idea of a very high powered pneumatic for a long time. if there is anything i can do to help you as far as making any metal based parts please let me know. i would donate my time and expertise. i am a machinist with access to cnc lathes and mills.

i like the the looks of the primer. i wouldn't ruin it with paint. just primer up your barrel to match and you're good to go. no, seriously nice design and performance.

relax fellow spudders. first the news story already has given us a clue that he did something very unsafe. so anyone with intellect at all will realize that this was negligence on the individual and not the device. if the parents pursue any legal issues it will take a great deal of time and financia...

that would easily hold 30 psi safely without any concerns. i sure it would hold much , much more safely. that is a one piece cyclinder (seamless) im sure and judging by the pic the bottom has some roundature which makes it exceptionally strong for holding pressure. i cant remember exactly where i sa...

the stinger was my cannon. yes thats what i did. it was a firefighters oxygen tank. you can just unsrew the regulator and then weld on pipe if it is made of the same metal. on my cannon i also opened up the hole to the inside diameter of the pipe which was 2 inches or 50.8 mm. depending on what type...

about fifteen feet. i brought home 10 more sheets of half inch plywood today. im going to keep adding layers to my "box of truth" until it finally stops the golf ball.

added damage pics to the first post

thanks. i'm gonna add more sheets of plywood to my target tommorrow. i want to find out how many layers it takes to stop it. hopefully i can post more videos tommorrow night. i've acquired an oxygen tank to use to fill the stinger. just have to purchase a regulator. i can get it filled, with compres...

sorry it took so long to add damage vids. just edited 1st post with links to 6 videos. only shooting at 100 to 145 psi right now. performed pretty well though.

should work just fine. make sure you let the cement set up several hours just to be completely safe. i also always shoot new cannons at low pressures and gradually work my way up the pressure scales. remember safety first. good luck

your chamber/barrel volume ratio should be fine. what are you using for the valve?

a much less expensive way to add reinforcement to a pvc cannon is to wrap it with fiberglass. as pete zaria said, carbon fiber is in its infant stages of industrial usage. that along with new superalloyed metals and exotic composite materials are still consumer science fiction. but the military uses...

been out of town for a few days. it is an oxygen tank. rated to 2216 psi. the gun is very heavy. the tank alone has 3/4 inch thick wall at the rounded top and bottom. so it alone is heavy. its a handfull for one person to hold and fire. the heavy weight of the cannon virtually eliminates any recoil ...

if the 300 and leonitis would have had air compressors, golf balls, and 300
prototype stingers they would have defeated the persians. leonitis would not have missed the persian king with a golf ball!!!

just got back from more test firing. all i can say is wow!!! my buddy has two air compressors wired together and the one with the air outlet was regulated to only 100 psi max. the other compressors regulator goes to 160. so.... we took the one offline and hooked the stinger up to the 160 psi. we wer...