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Technical info: CPS-2000 & CPS-2500
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Pressure Chamber (PC):
For those who do not know how the CPS-2000 & 2500 get their power, they use a rubber tube that is referred to as a pressure chamber (PC for short). Water is pumped into the PC, which causes it to expand, and it will continue to expand as it is pumped until the rubber tube fills the plastic tube that it is inside. Look below if you need a picture to help to visualize this.
There are several aspects of a PC that can alter how a gun performs. First, the length that it can expand before reaching the end of its tube. This can change the shot time. More room to expand allows more water, which allows a longer shot time. This can also affect the pressure put on the water. But not as significantly as the second aspect. The thickness of the rubber walls of the PC is what really dictates how much pressure the water is under. The thicker the walls the harder the gun is to pump, but also it puts the water under much more pressure. The quality of the rubber can also affect the pressure that is put on the water. But since this is a hard thing for us to grade, I’m just going to leave it out for the sake of this article.
The CPS-2000 mk1 uses a different pressure chamber than the CPS-2000 mk2 and the CPS-2500. The CPS-2000 mk1 uses a much shorter and thicker PC. The CPS-2000 mk2 and CPS-2500 use a longer pressure chamber that is also thinner. Here are some side shots of the PCs. The Top one is out of a CPS-2500, but it is the same thing that is
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used in the CPS-2000 mk2. The bottom one came out of a CPS-2000 mk1. You may notice that the CPS-2000 mk1 PC is shorter, thus allowing it to expand further.
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In the picture to the right the PC on the right is from a CPS-2000 mk1. The one on the Left is a CPS-2000 mk2 and CPS-2500 PC. As should be obvious (I hope, but the pic is not perfect) the CPS-2000 mk1 has a much thicker PC. Its about 1/4 inches thick while the one used on the CPS-2000 mk2 and the CPS-2500 is between 1/8 and 3/16 inches thick.
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Barrel:
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The other major difference on the CPS-2000 and the CPS-2500 is the inside of the barrel. Now if you do not know, I refer to the part of the gun that is in between the valve and the nozzle as the barrel. The picture on the right can help to make it even clearer. This is the valve, barrel and nozzle of a CPS-2000. The CPS-2500 has a similar looking set up, only the nozzle is slightly different b/c it has to accommodate the selector. They both have the same size nozzle, but the CPS-2000 mk2 (same PC as the CPS-2500); get better range than the CPS-2500. Its not in the nozzle, but in the barrel.
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The real difference in the barrels is hard to see. If you were to take a cross section of the barrels is when it would really become apparent. They both have small tube, almost like drinking straws. These tubes run the length of the barrel. Actually all CPS guns have tubes, but I’m not going to get into them all here. These tubes are there for two reasons. First they help to guide the water to the nozzle after it has been released from the valve. With out these tubes the water would come out and would slosh around in the barrel before it made its way to the nozzle. This would give you a less powerful and sloppier shot. The second reason is that after you shot the tubes help to keep water in the barrel. This helps to give you a cleaner shot too. When water is in the barrel and you pull the trigger, more water rushes in, and you gun immediately (well almost) shoots out a coherent stream of water. When there in no water in the barrel the gun first sputters for a sec shooting out a mix of air and water before it starts to shoot it coherent stream.
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Now onto the differences in the barrels of the CPS-2000 and CPS-2500. The major difference in the barrels of these two gun is the tube that are used inside each ones barrel. They both have a number of smaller tubes that encircle the perimeter of the barrel. But the big difference is what is in the center. The CPS-2000 has a single larger tube in the middle allowing fast and unimpeded flow from the valve to the nozzle. The CPS-2500 on the other hand has
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two smaller tubes crammed into the same space. This causes neither to shoot directly out the nozzle, and the stream to be less coherent because of it. This is not a major set back when the CPS-2500 is set on 5x or 10x, but when it is set on 20x the incoherence of the stream is noticeable, and also causes it to loose range and power.
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Note:
I have tried to provide as much info as I can. I know that there are more factors that have to do with range, power, and performance that I have not mentioned. Some such as the quality of rubber have no real way to measure them. Others are too generic, and since this is about the unique features of the CPS-2000 and the CPS-2500 I tried only to go into those. Any feedback would be greatly appreciated. Send it to: toothpickmatt @ hotmail.com
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