YAY! my project is finished. Its a standard piston gun with a simple modification; you barely ever have to reload! I made a hole at the front of my pistol on top and attatched a lid from a coke bottle. Using a simple flap valve it opens, letting more water in when you draw the piston back, and when you push the piston forwards the valve shuts, and it fires like a normal gun.
Ill get some photos and diagrams up soon.
Modification to piston gun
- Silence
- Posts: 3825
- Joined: Sun Apr 09, 2006 9:01 pm
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- Posts: 4
- Joined: Sat Dec 09, 2006 5:28 am
I made a newer model today with a few improvements.
From the first to the second model i have found that: the water needs a fairly small hole to exit the gun through. A valve is not required, and it only adds more complexity, A near perfect seal is required on the piston.
It is basically a small piston gun, but just think of a bottle cap with a hole going through it into the pvc. Then just screw a bottle filled with water on top, and you won't be running out of ammo any time soon.
The bad news: it's not perfect. I can't get a perfect seal around the piston, and range is only about ten metres, but fortunately whatever it hits, it drenches.
Once i get the batts charged for my kodak ill get some shots.
From the first to the second model i have found that: the water needs a fairly small hole to exit the gun through. A valve is not required, and it only adds more complexity, A near perfect seal is required on the piston.
It is basically a small piston gun, but just think of a bottle cap with a hole going through it into the pvc. Then just screw a bottle filled with water on top, and you won't be running out of ammo any time soon.
The bad news: it's not perfect. I can't get a perfect seal around the piston, and range is only about ten metres, but fortunately whatever it hits, it drenches.
Once i get the batts charged for my kodak ill get some shots.
- Silence
- Posts: 3825
- Joined: Sun Apr 09, 2006 9:01 pm
Generally speaking, these are the measurements we use for pumps:
- 1/2" PVC for the pump tube (the ID/inner diameter is actually a bit larger than 1/2")
- 3/8" OD/outer diameter for the pump rod
- O-ring with 3/8" ID and 5/8" OD
- Electrical tape wrapped around the pump rod on either side of the O-ring to keep it in place
What is the diameter of your pump tube? It should be a bit larger, maybe 1" for best performance, and I can give a few size suggestions once I know the size of the tube. Thanks.
- 1/2" PVC for the pump tube (the ID/inner diameter is actually a bit larger than 1/2")
- 3/8" OD/outer diameter for the pump rod
- O-ring with 3/8" ID and 5/8" OD
- Electrical tape wrapped around the pump rod on either side of the O-ring to keep it in place
What is the diameter of your pump tube? It should be a bit larger, maybe 1" for best performance, and I can give a few size suggestions once I know the size of the tube. Thanks.