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TShirt Lobber - My first 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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TShirt Lobber - My first cannon

Unread postAuthor: greene123 » Sun Jun 22, 2008 2:41 pm

This is my first cannon project and I wanted to take the opportunity to brag (of course) and to get some constructive criticism.

This cannon was built to launch tshirts in short range areas such as small auditoriums and basketball gyms. All the PVC is 3" Sch 40 pressure rated painted satin black with Kryon Fusion. The valve is an Orbit Watermaster with a blowgun mod. The pipe fittings are galvanized one inch pipe that includes a tee to hold a 115 PSI pop-off valve for safety and a standard air compressor quick connect fitting. I'm using a Kobalt CO2 system (thank you Lowes) with 9oz tanks. In use the 9oz tank hangs nicely from my belt and doesn't get in the way. With inside use I haven't had to take the pressure beyond 40PSI for my 50-ish foot target ranges. I need to paint the valve / fittings and get some shorter 1" threaded pieces to tighten up the whole thing, but other than that this thing is good to go.

I originally had an over-under design for this, but with an overall length of 38" (12" chamber and 15" barrel) it's just the right size to be impressive without being cumbersome as an in-line model. I may make a smaller diameter barrel for it as well since I've found that I have to roll little kid tshirts into a ball to get them to seal the barrel vs. the ballistic burrito I get with adult size shirts.

Thoughts, criticisms or warnings?
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Re: TShirt Lobber - My first cannon

Unread postAuthor: jackssmirkingrevenge » Sun Jun 22, 2008 2:48 pm

greene123 wrote:Thoughts, criticisms or warnings?


Simple and well made, as to safety you seem to have it covered ;)
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Unread postAuthor: Lentamentalisk » Sun Jun 22, 2008 3:25 pm

That is wonderful! Great job on your first (I would guess) cannon! Looks fairly clean, and seems to work well from what you say.

How much did the whole CO2+regulator setup cost you?
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Unread postAuthor: pizlo » Sun Jun 22, 2008 3:36 pm

Lowes says over 80 bucks for the reg, and probably bout 15 for the tank. For that money you could have picked up the realy nice stabalizer reg, but whatever, you have a nice gun. How many shots you getting off a 9oz?
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Unread postAuthor: n-strike » Sun Jun 22, 2008 3:59 pm

That scared me, I thought it was ABS until I saw you painted it. Nice job! I love it! And by the way, you should remove the nozzle at the bottom of your blow gun.
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Unread postAuthor: greene123 » Sun Jun 22, 2008 4:07 pm

Aye the Kobalt regulator with 2 9oz tanks was $80 + tax. I had looked into a simple regulator with a remote line for this, but after it was all said and done the prices that I was looking at were close so I went with the immediate gratification angle since I could pick it up locally.

With all the goofing around and test fires I'm not sure on a shot count per tank. I going to say at least twenty.

And yes this is my first cannon though not my first time to make things go boom. :)
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Unread postAuthor: biggsauce » Sun Jun 22, 2008 9:21 pm

Nice work, good to see someone using a safety valve. 8) Safety is still cool in my book

Looking forward to seeing more clean cannons from you
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Unread postAuthor: TwitchTheAussie » Sun Jun 22, 2008 9:40 pm

Good work mate. May it serve you well :P
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Unread postAuthor: battlemonkey » Mon Jun 23, 2008 2:03 am

Nice to see a good looking cannon on here. Just a thought, you could make the barrel a bit longer, just to get some more muzzle velocity.
Also, i've been wondering for a while, what does one with a cannon that launches T shirts. Do you fire them into crowds at events?
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Unread postAuthor: jackssmirkingrevenge » Mon Jun 23, 2008 2:07 am

battlemonkey wrote:you could make the barrel a bit longer, just to get some more muzzle velocity


Perhaps the short barrel is because he wants to just distribute t-shirts, not knock the audience out ;)
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Unread postAuthor: starman » Mon Jun 23, 2008 2:14 am

Looks like a sweet little system. You could launch confetti as well with this. It actually makes me want to consider a similar CO2 project.
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Unread postAuthor: mark.f » Mon Jun 23, 2008 8:48 pm

jackssmirkingrevenge wrote:
battlemonkey wrote:you could make the barrel a bit longer, just to get some more muzzle velocity


Perhaps the short barrel is because he wants to just distribute t-shirts, not knock the audience out :wink:


http://www.youtube.com/watch?v=euuVCieBZvY

:D

In seriousality, though, nice launcher. How many shots are you expecting out of that 9 oz. thank, though?
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