Paintball Artillery Gun

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
Luke31
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Wed Jun 09, 2021 11:30 pm

Hello people. I would like to share a project I've been working on for awhile. Its going to be an air cannon designed as an artillery gun for paintball games.

Below are some 3D images I've done of the final vision (I do 3d modeling). Its going to shoot groups of water balloons at the opposing team. It will fire indirectly operating behind the frontline.

The barrel will be 10 ft 4 inches. I plan on shooting 12 or more 6 ounce water balloons at once. I have been able to shoot 12 6 ounce balloons around 160 yards at 100 psi with a prototype.

I made a facebook page where I post updates
https://www.facebook.com/MechanizedPaintball
paintball artillery.png
paintball artillery 2.png

Here is the first prototype.
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Short video firing 8 balloons. The gun in the video is a 3'' barrel.


The gun will be breach loading and use shells filled with water balloons. There will also be a recoil system helping the gun absorb the shots and make a really cool effect. There will be pulleys for the operator to aim the gun. I am designing it to quickly refill its air chamber, making it able to reload fast and get more balloons down range. It will require an artillery crew and everything just like a real one.

Right now I'm in the process of building a 2nd prototype that will basically be a mini version of the final one. With so many new systems and devices its best to build a small one first.

I really like the idea of building bigger guns, tanks, and equipment for paintball games. Hopefully this project will be a success and I can build more ideas.
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mark.f
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Sat Jun 12, 2021 12:36 pm

Neat! We need a few more details on how it works, it looks like there's 3 sprinkler valves and the chamber can't be the whole length of that bottom pipe (or could it?).

Only suggestion I have is to pneumatically pilot the three valves instead of electronically. You can hear the diaphragm "honking" towards the end of the shot so you're probably not getting as much flow as you could if the valves were opening completely and staying open.
Luke31
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Sat Jun 12, 2021 2:42 pm

mark.f wrote:
Sat Jun 12, 2021 12:36 pm
Neat! We need a few more details on how it works, it looks like there's 3 sprinkler valves and the chamber can't be the whole length of that bottom pipe (or could it?).

Only suggestion I have is to pneumatically pilot the three valves instead of electronically. You can hear the diaphragm "honking" towards the end of the shot so you're probably not getting as much flow as you could if the valves were opening completely and staying open.
I plan on using a simple ball valve for the final design. I'm going back and fourth between a 1'' ball valve and 2'' ball valve. I did a couple test and they appeared to have performed the same. The 1'' is much easier to to open so I am leaning toward that.
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mark.f
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Sat Jun 12, 2021 2:51 pm

You could also spring-load them or even just add a larger handle to the valve as well. I think with a few bucks worth of tubing/fittings, and a small 1/4" ball valve, you could really make those three sprinkler valves work a lot better as well though, all depends on what you want to do.
Luke31
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Thu Jun 17, 2021 12:16 am

Here's some pictures of the 2nd prototype. Its a 1 1/4 inch barrel that allows a 2ft shell to be loaded. I built two different breach loading mechanisms I thought could work. The first is a screw in breach that has the air enter from the bottom. The 2nd is a cam lock where the air enters directly from behind via a hose.

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I need to decide which design to go for. I would like to get some opinions.

As far as cool factor, the screw in system wins IMO. It feels pretty fun to use. The breach has to be screwed out via using handles on the back that act as a crank, then pulled out and pushed aside to load the shell in. Once the shell is in, do the motion again in reverse to ready the shot. It feels like your using a real gun. I could see the whole movement being invigorating when your with a team of people doing rapid firing on enemy positions.

Here is the video where I got the idea.


The cam lock system seems more practical. The screw in system requires the air to enter from the side or bottom rather than directly behind. Requiring special shells to be made that has slits in them in order to let the air through in those directions. The slit also takes up real estate on the shell, leaving less room for balloons. The shell and possibly the gun would have to be a bit longer in order to have the same amount of balloons you could get with the cam lock design.
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mark.f
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Thu Jun 17, 2021 10:38 am

Just as a matter of opinion: cam locks all day every day. :P In a mounted configuration like yours screw breech works well enough, but any usage where the barrel is free to move in any other axis than forward/backwards (and rotating) they become very annoying.
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