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It's been a while...

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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It's been a while...

Unread postAuthor: potatoflinger » Thu Jul 16, 2009 8:19 pm

...but I'm still building cannons. The inspiration for this one came from my mother actually. A few days ago she walked through my bedroom and tripped over a cannon that I had sitting on the floor, then she told me that if I didn't move it out of the way she was going to throw it out. I wasn't very satisfied with the performance of the cannon, so I took it apart along with a few other cannons and I built a golf ball shooter.

Alright, here are the specs for anyone interested.
Main firing valves: two 3/4" QEVs

Pilot valve: 1/4" QEV

Chambers: Two 36" x 1.25" galvanized steel pipes.

Right now the only barrel I have for it is a golf ball barrel which is five feet long, but I'm planning on making a tennis ball barrel soon.

Sorry for the crappy pictures, they were taken with a cell phone in bad lighting, but they will have to do for now.

The golf ball barrel is actually sleeved 2" PVC pipe. It works very well.

I don't have any damage pics yet, but a friend and I were shooting it at a local school and I had the gun in the bed of my truck, with the barrel pointed straight out of the bed. The barrel was pointed straight, not angled up at all and at 150 PSI a golf ball went over 800 feet. (I will post a screenshot of a map to prove it if anyone wants)
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Attachments
0716092030.jpg
The full cannon
0716092027a.jpg
The pilot valve (1/4" QEV)
0716092027.jpg
The firing valves
0716092028.jpg
The sleeved 2" barrel
It's hard to soar with eagles when you're working with turkeys.
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Unread postAuthor: far_cry » Thu Jul 16, 2009 8:58 pm

will he looks wonderful and powerful
but i think that the elbows and the T thats connected to the barrel will slow the flow ,specially the T when the compressed air meets . this will cause a turbulent flow

otherwise the gun looks great.and what is the blue thing on the fitting and what pressure this canon use ?
bravo
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Unread postAuthor: potatoflinger » Thu Jul 16, 2009 9:00 pm

The fittings where the valves meet are all 1" fittings, so it shouldn't hurt performance by much.

The blue stuff is plastic bags, I use them instead of teflon tape to seal the threads.

I use this cannon up to 200 PSI
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It's hard to soar with eagles when you're working with turkeys.
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Re: It's been a while...

Unread postAuthor: twizi » Thu Jul 16, 2009 9:23 pm

[quote="potatoflinger I were shooting it at a local school)[/quote]


you were shooting at a school wow :?

i wish i could do that :twisted:
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dont play with airsofter with 1000$ gun and play with a 5 dollar pair of glasses
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Unread postAuthor: jonnyboy » Thu Jul 16, 2009 9:56 pm

If the valve is only 3/4 inch then there will be no flow choke because it actually increases in size.

during summer vacation after the first couple weeks after all the repairs are finished for the next year you will never see a car in the parking lot.
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mobile chernobyl wrote:I can shoot a Canuter Valve off my '82 Chevy Ram F150 AT LEAST 3/4 Mile with 'ma cannon made of soup cans duct taped together, then I just squirt some bacardi 151 in the chamber and hold up my cigarrete lighta and WHOOSH! That thing flies at least 3/4 mile
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Re: It's been a while...

Unread postAuthor: potatoflinger » Thu Jul 16, 2009 10:10 pm

twizi wrote:[quote="potatoflinger I were shooting it at a local school)



you were shooting at a school wow :?

i wish i could do that :twisted:

We weren't shooting at a school, we were shooting on the sports fields on the school property.

The barrel chokes the flow a little bit because there are two 3/4" valves dumping into one 1" pipe, but this cannon was built mostly out of spare parts so performance wasn't the first priority.
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It's hard to soar with eagles when you're working with turkeys.
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Unread postAuthor: MrCrowley » Thu Jul 16, 2009 10:34 pm

Looks pretty nice, must be heavy though. No reason that can't shoot 800feet I say, especially at 150psi.

My school has 3 fields all next to each other, gives me about 400m to shoot on but I usually just stay home and shoot on to the golfcourse from my house :D
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Unread postAuthor: potatoflinger » Fri Jul 17, 2009 8:02 am

GGDT said that at 150 PSI it would shoot just over 600 feet, but I think that was pretty far off because it shot well over 800.

It is pretty heavy, but that isn't too big of a deal.
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