Nope, its on hold. Actually, I was radically redesigning. I will post more designs within a day or two. I have been thinking about the slide (sleeve) valve, and how to improve. Specifically, a response trigger. When this type of trigger is depressed, it fires and rebounds, pushing itself into an "at rest" position. All you have to do is maintain finger pressure against the trigger for full auto. Basically, the trigger moves back and forth by itself very rapidly until you let go.
Update time. I have been thinking about the sleeve valve 3-way trigger. Here's a picture of the normal sleeve valve, where the pilot air exhausts to the atmosphere.
What if this air was harnessed? It could be directed to pressurize the helical mag, cycle a bolt, or achieve (almost) auto fire. If you are familiar with paintball, a response trigger is similar to a normal one, except that it pushes back against your finger after it has been pulled, in order to reset itself. AS long as finger pressure is maintained, the trigger moves back and forth rapidly, making for a near-auto rate of fire. This is used as a loophole in some field's "no automatics" rules.
Here is the spudders equivalent. See any problems? (Exhaust tube needs more surface area?) Has this been thought of before, and I am just ignorant of it?
There are enough plans on Spudfiles to keep you designing for about one year, you should start with a simple concept and build it. You can always modify it with new internals, I have the problem too that I design more than build .
G's from the Dutch, Tom
nothing personal hubb017 but I've almost made the XM-500 Paintball Sniper.
Its made out of steel with a mod sprinkler valve, just like the picture I've made a silencer and bought a scope off ebay (pretty cheap $40).
haha not that any of that really matter here,
but yeah i think you should do it.
Well, I've got together most of the materials, and have begun assembly.
So far, I turned the barrel down to sleeve into 1" sch 40 pvc, modded the ammo feed tee, cut some pipe and dry fitted stuff together.
The paintballs have an excellent fit into the 3/4" sch 120 pvc. Using the barrel like a blowgun, the paint broke easily from 10 yards away. GGDT says I need about 50 psi to achieve 300 fps with the 3' barrel and 1' chamber.
I have yet to machine the bolt to fit, and I still need to get o-rings and other small parts. I am worried about fitting a spring, o-ring, and blocker wire inside of the bolt, and also about it's small surface area. It has an area of .4917" squared, so 50 psi will result in about 25 pounds of force on the bolt.
Also, will the air from the 3/8" slide valve (with 1/2" sleeve) be enough to fill the 12" by 3/4" chamber 8 times a second at 50 psi?
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