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Grafiti Rat pb cannon

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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Grafiti Rat pb cannon

Unread postAuthor: huse_spud » Sun Jun 04, 2006 10:08 pm

the Grafiti Rat is a burst disk style paintball gun.

this gun was an interesting project. i thought out the designs while walking around the plumbing section of a home improvement store, so i really didn't know how it would turn out. this gun was also a cheap build (under $20, i think).

it shoots fairly well, makes good-sized dents in stuff and put a quarter-inch deep gash into a tree. And because its a burst disk, it makes a cool crack when it fires. I had to do a little troubleshooting to get the gun to work though.
overall, i am impressed with this gun's performance. The downside is that you have to keep replacing the disks after you fire and its limited by a 25 foot extension hose, but that's what i had to compromise to have more power so its all good.

sorry about the pics, i used my webcam
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Attachments
filling end.jpg
the filling end allows you to control the air entering to an extent.
burst disk.jpg
entire gun.jpg
there it is, all 35 inches of it!
Last edited by huse_spud on Sat Jun 10, 2006 12:03 pm, edited 9 times in total.
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Unread postAuthor: sergeantspud2 » Sun Jun 04, 2006 10:19 pm

Looks cool but I have 2 questions,
wouldnt the shrapelnel from the burst disk bust the paintball?
and
where did you get the cpvc and how good does a paintball fit in it?

Nice cannon again :D
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:D Always rely on Murphy's Laws :D
4.If you have enough grease & a big enough hammer, you can put anything... anywhere
3.If all else fails, hit it with a big hammer
2.Matter will be damaged in direct proportion to its value
1.If anything simply cannot go wrong, it will anyway
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Unread postAuthor: Andrew52 » Sun Jun 04, 2006 10:20 pm

thats nicewhat do you use for your burst disk material aluminum milk jug or 2 liter plastic
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Unread postAuthor: huse_spud » Sun Jun 04, 2006 11:27 pm

i havent used the gun yet but im gonna see what materials wont damage the paintball (maybe a more flexible plastic that won't shatter so much, if that doesn't work i could try freezing the pb's).

i got the cpvc at theisen's (small midwestern chain) and its a nearly perfect fit, i got the cpvc repair coupling at menards though (another midwestern chain, i think)

i wonder if those slingshot balls would work as ammo?
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Last edited by huse_spud on Sun Jun 04, 2006 11:44 pm, edited 5 times in total.
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Unread postAuthor: CS » Sun Jun 04, 2006 11:33 pm

.75" CPVC is like only .01" off of the size of a PB, so its almost a perfect fit. Although CPVC is different sizes then regular PVC. I ended up sanding down a coupling so that it could fit inside of a 1" socket for PVC. Although they should have some transition peices.
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Unread postAuthor: rna_duelers » Mon Jun 05, 2006 2:12 am

Nice gun,What your estimate on distance?And when do you get to fire the mean thing?Cuz i wunna see some damage pics....Always with the damage... :twisted:
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Unread postAuthor: Benny » Mon Jun 05, 2006 4:35 am

what did gas gun design tool say?
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F*ck the bunny... i got a fishy ><>

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Unread postAuthor: huse_spud » Mon Jun 05, 2006 7:34 am

i'll bring damage pics for this gun as soon as i get my hands on a digital camera. I'm planning to fire it tonite

i didn't use the GGDT because i don't have one. i'd like to use that.
don't you have to pay to get one? or use paypal or something?

LATER THAT NIGHT: I finally fired the gun after waiting 24 hours. the results are posted at the top.
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