My first piston cannon. With damage vid.

[Gippeto]

Finished this a couple weeks ago. It works WAY better than I expected it to.
Thanks for providing such a complete source of information all in one place.

Specs,

All pipe is 1 1/4" sch 40 pvc with a pressure rating of 370psi
All fittings are sch 40 pvc pressure rated (to what?)

barrel 36"
chamber 48" approx.
piston is a 1 1/2" end cap faced off and bored to fit over the 1 1/4" fittings.
Bumper is a buna o-ring
sealing face is neoprene diaghragm material


Thanks, for looking, let me know what you think.

Edit for spelling/ trying to add pics and video

[psycix]

It looks good!
What pressure did you take it up to? And did you use more damaging ammo then just marshmellows?
Also, could we have damage pics or even a vid?

Its a nice cannon, and I wish you a long happy spudding time with it.

[elitesniper]

interesting design , looks good you should cut off some barrel and add a threaded coupler so you can change to differnt barrel sizes

[pizlo]

Very nice design, I like guns that start to look and get held like real guns.

[jrrdw]

I can just hear that marshmellow hitting with a splat. Does it stickum to the wall? Nicely done!

[Gippeto]

Hey, Thanks!

Psycix - I shoot at 90 psi (I fill with a regulator). It is currently -23 C here, this means indoor testing and non penetrating types of ammo. (the boss would be PISSED if I shot a hole in the wall) I'll see about a vid in the next couple days.

Elite - A golf ball barrel might be cool for spring.

jrrdw - It hits pretty hard, I sure wouldn't want to be down range. Disappointingly, they only stick occasionally.