quick chrono question

[magman007]

it is a system that would work, there is no argument there, it just isnt feasable. and, once the temperature rises throughout the day, the gun would be re adjusting its self. also, if we are playing with dwell, the marker could put its self into the point where it isnt performing to its maximum potential. also to whoever suggested using the spool valve, adjusting the dwell isnt going to do much on a spool valve, all of maybe 5 fps from 18 to say 40 ms.

[sunyjim]

Sorry for the Hijack - Response to question

The history article you posted was a pretty good (and lengthy) read. Although I did find a few inconsistancies.....are we truly to belive that the regualtor on an HPA tank is what makes it more consistant than CO2.......discuss?

/hijack

Yes the regulator is exactly what makes it more consistant.
Sure CO2 fluctuates by temperature. From day to day, the temperature is different so the velocity needs to be adjusted. But it is a very stable self regulating gas.
A bottle filled with a mixture of liquid and gas CO2 (normal fill), when the valve is opened the tank will put out a reasonably constant pressure over an extended period of time. Roughly 800psi depending on temperature. but assuming the temperature remains constant, the pressure remains constant until the tank is out of liquid CO2.
Compare that to a N2 cylinder, 4500psi, open the valve and the pressure immediatly begins to drop and continues dropping on essentially a straight line until the tank is empty.

So imagine if you were trying to make a marker that would run on 4500 psi, an air tank would be useless, the pressure would very quickly drop out of useful range and the marker wouldn't function. But markers don't, they run on a much lower pressure (ususally 800psi because CO2 was the gas used by the designers) so a regulator was designed to reduce tank pressure to operating pressure. It accepts whatever the tank is outputting and gives a set, much lower operating pressure amount, and continues to do so until the tank runs below the operating pressure. The paintball regulator is essentially a device that is designed to replicate what CO2 does on it's own.
So opening the valve on that same air tank now with a regulator, the tank would now put out a consistant pressure until it ran below that operating pressure.

True, trying to play speedball at 20bps with even regulated CO2 is going to give some trouble unless the marker is running a very low pressure like an Airstar Nova (ran on 95psi with a built in regulator), the co2 can't boil into gas fast enough to keep up with a standard 800 psi marker firing over I'm guessing 12 bps.

But say two identical markers with identical built in regs. One with Co2, the other a N2 tank directly connected with no tank regulator. Then fired at an equal 5 bps over a chronograph, I would be willing to bet that the CO2 out performs the N2 for shot to shot consistancy hands down.
The Co2 is essentially dual regulated, the tank already puts out a reasonably constant pressure of 800psi, where the N2 puts out an always changing, falling pressure. The regulator just refines the pressure of the co2, but has to work very hard to maintain a constant with the falling input pressure of the N2

Sorry the reply is so long.