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My most recent pnematic

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 most recent pnematic

Unread postAuthor: bigbob12345 » Tue Jan 01, 2008 1:20 pm

Well this is my most recently completed cannon and it packs a surprising punch for its size.

The specs
Chamber:3ft of 2in PVC
Barrel:4ft of 1in PVC
Valve:Modified 1in sprinkler valve piloted by a blowgun

I dont now what the muzzle velocity is but Im guessing in the 600-800fps range with specilized ammo.My primaly amunition is hot glue ammo,little peices of a bannana(they fit absolutly perfectly in the pipe) and of course potatoes.I plan to give it exchangeable barrels eventually and maybe modify the blowgun.This is just a very basic pneumatic that I made for 15 bucks(not including the sprinkler valve)but it works well and is my first pnematic that is completly air tight.I will paint it soon and am looking for suggestions on which color I should use.
Here are some pics

The cannon
Image

The 1in sprinkler valve
Image

Looking down the barrel
Image

Damage to full milk jug with potato
Image
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Last edited by bigbob12345 on Fri Jan 04, 2008 8:51 pm, edited 1 time in total.
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Unread postAuthor: potatoflinger » Tue Jan 01, 2008 1:40 pm

Nice gun, you did a great job with the primer, I can't even see any stains :P
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Unread postAuthor: WOW!! » Tue Jan 01, 2008 1:49 pm

Looks great! Great job with the primer.
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Unread postAuthor: pizlo » Tue Jan 01, 2008 1:50 pm

Damn this is quite like my holiday project, As far as I knew it would be the first or second cannon to have the chamber over the barrel. I would have posted it already, but I'm still combating the many little leaks and such.
Very nice construction, I envy your lack of leaks.
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Unread postAuthor: bigbob12345 » Tue Jan 01, 2008 2:18 pm

Im glad to hear all the positive feedback but there are a couple of primer stains but they are hard to see in the picture
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Unread postAuthor: MrCrowley » Tue Jan 01, 2008 5:00 pm

Looks good, very clean as well.

600-800fps is probably pushing it for glue and a banana at pressures under 100psi. At 100psi I could only get around 400fps in GGDT, but i'm sure you could get 600fps with a specialized ammo.

pizlo wrote:As far as I knew it would be the first or second cannon to have the chamber over the barrel


Isn't that just a over-under cannon upside down? :P
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Unread postAuthor: bigbob12345 » Tue Jan 01, 2008 5:49 pm

I meant 600-800fps with specialised ammo I just listed the ammo I normaly use I guess I should have been more clear.
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Unread postAuthor: MrCrowley » Tue Jan 01, 2008 6:02 pm

What pressures do you run this baby at? :P
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Unread postAuthor: bigbob12345 » Tue Jan 01, 2008 6:33 pm

I usually run it at 80-100psi but sometimes when like pumping a little more(Dont have compresser)I go up to 120-130 but that is the max I feel safe putting in there.
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Unread postAuthor: nivekatoz » Fri Jan 04, 2008 8:34 pm

Nice gun clean design..The only thing I think I would chage is the trigger...
some how use a blow gun or a safty pop valve for the triger....
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Unread postAuthor: bigbob12345 » Fri Jan 04, 2008 8:49 pm

I already use a blowgun,I dont get what you mean by that.
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