4 replies to this topic

[Sponge Nerfer]

This is just a realy easy to make, efficient, reliable and fun gun. The good old fashion ball valve rifle. Not much to describe, I was bored today, I had some old parts hanging around and I threw em togethor. I improved the ballvalve by attatching a metal dowel bent into a handel shape. The gun made for a nice afternoon of shooting stuff. The best part is that its pretty easy to figure out how to make yourself and you can change it to fit your needs and desires. I used a shrader valve for input, a section of 2" pvc as the main tank, and a 3/4" ballvalve to shoot the thing. It gets about the same ranges as a titan and is a whole lot cheaper (this badboy cost me a grand total of 0 dollars, I had all the parts, if you have absolutely nothing your looking at around 10$). Without further ado here are some pictures.

Overall Gun:



Compared to a Shoe:



The Tank:



The valve with its handel:



Cool first person view:



Well thats about it, comments are welcome as always.

-sponge

[Gyrvalcon]

Won't the handle that you added to the ball valve just make for a slower release? You get lots of torque with that, but not as much speed, right?

[monkey with a nf]

I think the idea is to make it easier to open; ball valves take a fair amount of force.

[GeneralPrimevil]

It seems to me as if blisters will appear rapidly using that handle.


Perhaps attach some sort of sleeve (1/2" CPVC?) using an e-clip in a groove on the end of that handle? That may increase opening time by all of a hundredth of a second, as well.



If one were really worried about opening time vs. ease of use, finding a compromise in length would be the simplest option in my mind. Obviously shorter = faster, longer = ease of use in this application...



Or just get some muscle on those forearms. Try taking a 2" or so cylinder (old piece of exhaust pipe), drill a hole in the middle (all the way through both sides), run a good sized length of string through the hole, tying one end to the cylinder the other to a plate-style weight (something you'd see on the end of a freeweight bench press bar). Twist the cylinder in both hands, wrapping the string around the cylinder. This should be lifting the weight in the air, at the same time exercising most of the muscles used when opening a ball valve.
Don't overdo it with wrist exercises: carpel tunnel syndrome is so enjoyable.



I like that duct tape sling. I may have to make one of those for my girlfriend's rifles...perhaps an AK.

[Prometheus]

Gyrvalcon, on Jun 18 2007, 12:33 PM, said:

Won't the handle that you added to the ball valve just make for a slower release? You get lots of torque with that, but not as much speed, right?

True. T=Fd, so the torque is great due to a long handle (d = radius). The opening time is longer, due to the distance you need to travel.