diaphragm coaxial sprinkler exhaust cannon

hi · Fri Jun 29, 2007 1:40 pm

I thought i would never do it, bu i accually built a diapgragm cannon. this is based off of my cousin's cannon, but this is smaller.

chamber- about 3 feet of 2''sch40 pvc.

barrel- about 3 feet of 3/4'' sch40 pvc.

valve- diaphram built into a union.

exhaust- sprinkler valve (may be over kill, we will have to see when i fire it.)

i built this mostly with spare pipe, but had to buy fittings. i already had a sprinkler valve, so i didnt see any reason to buy a ball valve for exhaust.

the diaphram is built into a union and is made of three sheets of innertubes from a bike tire.

intended ammo is paint balls and marbles.

i havent shot it yet. i still need to add a equilization hole and put some hose and a blowgun on the sprinkler valve. it will be fired on the shoulder, like an anti-tank weapon.

im hoping this will be very powerful, let me know what you guys think.

spud yeti · Fri Jun 29, 2007 1:45 pm

Nice cannon! Im also building a one like that, just a bit smaller. I really like it though and you have inspired me to go build my one now!

Good work though!!

EDIT: actually, great work!

potatoflinger · Fri Jun 29, 2007 2:05 pm

That looks great, it should be pretty powerful

hi · Fri Jun 29, 2007 2:12 pm

thanks guys, this is the most primer unstained cannon i have built, so i am there for proud of it.

spud yeti · Fri Jun 29, 2007 2:25 pm

lol, yeah, I cant see any there! You sure you used any?

Jokes. Are you going to spray it?

hi · Fri Jun 29, 2007 2:28 pm

ya i used primer, just was really carful. i might paint it, but i dont know what color yet. it would look cool olive drab. i need money before i do anything.

hi · Fri Jun 29, 2007 6:00 pm

spud yeti wrote:Nice cannon! Im also building a one like that, just a bit smaller. I really like it though and you have inspired me to go build my one now!
Good work though!!

EDIT: actually, great work!

have you acctualy started, or did you just have the idea when you saw mine? go ahead and build one, its not my design and i have no problem with it, im just wondering how its comming.

spud yeti · Sat Jun 30, 2007 5:06 am

I actually had already started mine a couple a days before I saw yours. It is now finished, but I have 2 problems:
1) I cant get my barrel straight in the chamber, it always flops down
2) I lost by bike pump when I was racing Nationals last week

But otherwise its complete! Woohoo!

hi · Sat Jun 30, 2007 1:30 pm

for a barrel center thing, i just took a 1.25'' endcap and cut it into quarters. and just used one of them.

as for the pump, i cant help you.

spud yeti · Sat Jun 30, 2007 2:54 pm

Thats a really good idea. Mind if I use it in my gun? Thanks a lot for that!
Yeah, I guess its to the bike shop... AGAIN!

pvcmaster · Sat Jun 30, 2007 5:03 pm

hi wrote:for a barrel center thing, i just took a 1.25'' endcap and cut it into quarters. and just used one of them.

as for the pump, i cant help you.

Sorry, i dont really understand this concept with the endcap. could you show me a diagram or explain in more detail? I need some help in this area. Thanks

hi · Sat Jun 30, 2007 6:01 pm

yup, you sure are a pvc master... jusk kidding.

take a 1.25'' and cap and cut it into 4 equal peices. take one of the pieces and put it between the barrel and the chamber and glue it.

it that still doesnt make sense i can take a picture. its very very simple.

pvcmaster · Sat Jun 30, 2007 6:51 pm

Yeah sorry got it now. Dont insult the master of pvc... lol.

Mitchza89 · Sun Jul 01, 2007 3:15 am

Great looking cannon there mate. She should kick like a mule on crack!

Regards,

Mitch.

spud yeti · Mon Jul 02, 2007 4:30 pm

for a barrel center thing, i just took a 1.25'' endcap and cut it into quarters. and just used one of them

Tried it today and it works really well! Thanks a lot!