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"chris barthelson" <barthelson88-at-hotmail.com>
Re: Marker Q's [TANKS]
Fri, 16 Jun 2006 13:49:12 +0930
It is almost the same as my older "mk1" design, which worked well but
did not fire fast enough for my liking. So the newer "mk2" replaces the air
compressor and pressure switch with a co2 bottle and a regulator. It is made
up of two separate systems, the gas system, that is the bottle, firing
valve, accumulator, regulator and all the hoses. Then you have the actual
marker, the part that takes care of the loading.
The gas system is very basic. A Co2 bottle connected to a regulator which
fills a small accumulator with 140psi when you are ready to fire you press a
switch which opens the firing valve (sprinkler valve) momentarily, which
pushes the paint out.
The marker is the bit that requires the most fine tuning. The barrel has a
small hole big enough for a paintball cut in it. When in the "loading" or
"neutral" position the hole is open to paint so it can drop down from the
loading tube. When you press the fire button (on the transmitter) a servo
slides a little cover over the hole blocking the path of the paint, it also
presses the "gas systems" firing button which opens the firing valve
releasing the gas to the marker. After the button is released the servo
returns the cover to its neutral position allowing paint to drop into the
barrel and lets the gas system rebuild pressure, ready for the next firing.
Because a rocket launcher has to be muzzle loaded by the operator its better
to just have the barrels/tubes with no loading mechanism. The gas system
would still work for several tubes but the accumulator would need to be
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