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The big one.

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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The big one.

Unread postAuthor: WOW!! » Thu Nov 13, 2008 7:58 pm

Here are the specs-
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Last edited by WOW!! on Mon Aug 10, 2009 2:57 pm, edited 1 time in total.
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Unread postAuthor: Demon » Thu Nov 13, 2008 8:09 pm

:shock:

This is really big!

but the sprinkler valve looks not enough for the barrel chamber size.

Good job! Was a long time before a new cool cannon apeared.

Yay first post!
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Unread postAuthor: WOW!! » Thu Nov 13, 2008 8:13 pm

Ya there not enough but for what I had they work till I make another 4"er valve.

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Unread postAuthor: mister pointy » Thu Nov 13, 2008 8:14 pm

HOLY CRAP! that thing is big!

Too bad the sprinkler valves are so small for the size of the gun.
If you had piston valves on that sucker, I bet it would kick like a mule, and put soda cans through anything in it's way.
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Unread postAuthor: FishBoy » Thu Nov 13, 2008 9:01 pm

even dual 2" pistons would be a humongous improvement, and they would be easy to make.
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Unread postAuthor: brogdenlaxmiddie » Thu Nov 13, 2008 9:18 pm

And where did you get 6 inch pressure rated pipe from? Did it cost your soul or was it on sale for your first born??? :lol:
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Unread postAuthor: SpudsMcGee » Thu Nov 13, 2008 9:22 pm

Dude, your name says it all, WOW! :shock:
What you need to try now is some kind of buckshot.
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Unread postAuthor: Hotwired » Thu Nov 13, 2008 9:58 pm

Quite a monster :)

Just never let that barrel get free of the chamber, the small bore pipes to the sprinklers will not be happy bunnies if the very large bore barrel ends up levering away at them.

The sprinklers are holding back the power, it took over a second for the cannon to fully vent but they're still producing a satisfactory result.
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Unread postAuthor: WOW!! » Fri Nov 14, 2008 6:56 pm

Yea I do know how to make them all but just didn't have the money right now. And yes there is a lot of pressure on the connection were the 1" goes to the chamber, that is why I have the barrel taped down like that to relieve the pressure on the joint.

I got the pipe from my job this summer, the plumbers gave it to me because they were just going to pitch it out, it was a cut off of a 20' section. But the nice thing is there is a supply place by my house and a 10' 6" pipe is around $30-40 :wink:


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Unread postAuthor: Velocity » Sat Nov 15, 2008 1:16 pm

Instead of doing dual 4" piston valves, just use one. Since the barrel is 3" already, a single 4" pistol valve (I assume 3" porting?) will work perfectly with it. Sure, having two would potentially give you more power, but due to all of the elbows and crosses you would add into the system, it would just end up costing you more with no performance gain.
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Unread postAuthor: jonnyboy » Sat Nov 15, 2008 1:49 pm

Wow this rivals the swat gun! Are you using that red tape as a barrel support? A gun this good needs a good paint job. You should crop the beginning of the video so it's just the shot. Do you have a stand for this thing?
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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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Unread postAuthor: MrCrowley » Sat Nov 15, 2008 2:12 pm

jonnyboy wrote:Wow this rivals the swat gun!

Actually no. IIRC, the SWAT cannon had two 10' 6" chambers, 20' barrels and a 4" piston valve.


It's a nice cannon nonetheless, i'm just waiting for you to stick a piston valve on that thing, it sends chills down my spine just thinking about what it could do :P
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Unread postAuthor: jmeyer1022 » Sat Nov 15, 2008 4:19 pm

May I ask what you used to go from the 1" up to the 4" I've been having trouble doing this.
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Unread postAuthor: MrCrowley » Sat Nov 15, 2008 4:31 pm

He didn't use 4" pipe on the cannon by the looks. He used a 1" male threaded adapter, to a 2" bushing which joins to a 2" elbow and tee, and then he used a 2" to 6" bushing I think.
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Unread postAuthor: jonnyboy » Sat Nov 15, 2008 5:30 pm

MrCrowley wrote:
jonnyboy wrote:Wow this rivals the swat gun!

Actually no. IIRC, the SWAT cannon had two 10' 6" chambers, 20' barrels and a 4" piston valve.


It's a nice cannon nonetheless, i'm just waiting for you to stick a piston valve on that thing, it sends chills down my spine just thinking about what it could do :P

Oh my bad I knew the SWAT gun was bigger but I thought it had a smaller diameter chamber. You need a bigger barrel on this WOW.
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