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MrCrowleys GB cannon, Built by me, Update: Fixeded

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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MrCrowleys GB cannon, Built by me, Update: Fixeded

Unread postAuthor: Northir » Mon Sep 14, 2009 7:25 pm

this is the golf ball cannon that MrCrowley shows you how to build in this instructiable http://www.instructables.com/id/GolfballAntennaNerf-Cannon---Build-One-That-Shoo/ i built it pretty close to the way he shows in his TUT with a few mods, i beleive i have a longer chamber and barrel, i can get it to shoot through 4 layers of carpet and 1" plywood, ill up more pictures and damage pictures in a little bit
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Last edited by Northir on Sun Jan 06, 2013 11:54 pm, edited 4 times in total.
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Re: MrCrowlys GB cannon, Built by me

Unread postAuthor: Technician1002 » Mon Sep 14, 2009 7:33 pm

Northir wrote: i can get it to shoot through 4 layers of carpet and 1" plywood,


Carpet is relatively wimpy. I was able to shoot a t shirt through 2 layers of carpet. The 1 inch plywood is impressive. Good job.
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Oops. T shirt damage to carpet. Went through 2 layers.
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Unread postAuthor: jrrdw » Mon Sep 14, 2009 7:35 pm

How about a video? Would like to see it in action.
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Unread postAuthor: MrCrowley » Mon Sep 14, 2009 7:47 pm

Looking good! Very clean also, would love a video if it isn't too much to ask haha :)
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Unread postAuthor: spudtyrrant » Mon Sep 14, 2009 8:05 pm

BEAT YOU TO IT!!! http://www.spudfiles.com/forums/2-inch- ... 17878.html
jk nice job
p.s.: loud ain't it
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Unread postAuthor: Northir » Mon Sep 14, 2009 8:14 pm

Heres some more pictures first is a comparison between all my launchers
Image

Now Damage Pics!

Image
Image
Image

Video of the cat litter canister soon, was filled with water(it was all i could get the wife to film -.-)
Edit: Here maybe. .
Image

ill have to get more that one doesnt really do it justice
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Unread postAuthor: THUNDERLORD » Mon Sep 14, 2009 8:37 pm

Looks like an awesome PVC cannon there!
Good job, nice damage pics.

BTW, Looks like a nice compliment for MrCrowley,
Also BTW, if you ever refer to his "Garage" It's "The Garage" with cap.s...
:wink: 8)
Edited: (for schpellink).
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Last edited by THUNDERLORD on Mon Sep 14, 2009 9:22 pm, edited 1 time in total.
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Unread postAuthor: Northir » Mon Sep 14, 2009 9:01 pm

Done and done :) also more damage!
Image

Image
Image
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thats 3/4 form board with a piece of 18 gauge aluminum ducting screwed to it

Just replaced this piston
Image

with this one made from Epoxy
Image
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Last edited by Northir on Sun Jan 06, 2013 11:54 pm, edited 2 times in total.
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Unread postAuthor: THUNDERLORD » Tue Sep 15, 2009 7:21 am

Impressive shots in the vids,
(no sound on computer last night)
I can really see the advantage of piston valve over sprinkler valve.
Is the new piston much lighter than the wooden one?? 8)
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Unread postAuthor: Northir » Tue Sep 15, 2009 1:29 pm

i think its a little bit heavier but the wood one was taking a lot of damage and was poorly built so i wanted to replace it, since i know what im doin now ill be playing with many different materials
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Unread postAuthor: PVC Arsenal 17 » Tue Sep 15, 2009 2:23 pm

Image


Boom headshot
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Unread postAuthor: Northir » Tue Sep 15, 2009 2:53 pm

well Epoxy pistons work well, maybe to well, heres the damage shots for the new piston . . .


Image

hmm somethin might be wrong. .


Image

the piston shot back with about as much force as the golf ball ripping the back of the housing off with it, so how do i repair that, i was thinking just grinding the female coupler off and attaching a new one, and yes i had padding

gotta have it back up and running by saturday night so i think i have time, just not any more material
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Unread postAuthor: dewey-1 » Tue Sep 15, 2009 3:34 pm

You need to make that piston lighter!

What is the total weight?

You will also need more "cushion".

I am guessing the epoxy version is a lot heavier than UHMW or HDPE equivalent.
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Unread postAuthor: Northir » Tue Sep 15, 2009 3:43 pm

yea it weighs about twice as much as the wood one
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Unread postAuthor: spudtyrrant » Tue Sep 15, 2009 3:51 pm

yeah check out mine http://www.spudfiles.com/forums/2-inch- ... 17878.html i had the exact same thing happen so i shortened the piston cut off the threaded part of the female coupler and used screws to hold in an o-ringed 1 1/4 inch coupling
p.s.: i used solid pvc rod for the piston so it should handle an epoxy piston no problem
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Last edited by spudtyrrant on Tue Sep 15, 2009 4:25 pm, edited 1 time in total.
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