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My first piston cannon. With damage vid.

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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My first piston cannon. With damage vid.

Unread postAuthor: Gippeto » Sun Jan 20, 2008 5:25 pm

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


http://www.youtube.com/watch?v=NgYKn3GsSFA
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Attachments
HPIM3712.jpg
The complete cannon
HPIM3713.jpg
valve internals
HPIM3715.jpg
valve complete and closed
HPIM3678.jpg
damage to marshmallows
HPIM3728.jpg
Can filled with water and shot @ 90psi
http://www.youtube.com/watch?v=miHGvreCPwA
alum shell 1.jpg
Worked up a new projectile. Will put up a vid when I shoot it. Hopefully this weekend.
Piston valve.jpg
Barrel sealer w/ light weight piston.
Last edited by Gippeto on Thu Feb 07, 2008 1:20 am, edited 9 times in total.
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Gippeto
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Unread postAuthor: psycix » Sun Jan 20, 2008 5:35 pm

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. :)
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Unread postAuthor: elitesniper » Sun Jan 20, 2008 5:41 pm

interesting design , looks good you should cut off some barrel and add a threaded coupler so you can change to differnt barrel sizes
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Unread postAuthor: pizlo » Sun Jan 20, 2008 5:42 pm

Very nice design, I like guns that start to look and get held like real guns.
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Unread postAuthor: jrrdw » Sun Jan 20, 2008 6:59 pm

I can just hear that marshmellow hitting with a splat. Does it stickum to the wall? Nicely done!
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Unread postAuthor: Gippeto » Sun Jan 20, 2008 11:40 pm

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) :shock: 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. :(
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