2100 PC expansion?

Threads about water gun modifications.
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Hunt_and_Annoy
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2100 PC expansion?

Post by Hunt_and_Annoy » Sat May 03, 2008 11:08 pm

I recently took the pressure chamber casing off my CPS 2100 to expand its capacity, which also enables you to see how much is in the chamber. I'm wondering if this has been done before, and why everyone doesn't do it, because it seems rather obvious and simple. And all my friends are amused at a water gun with a "Balloon" for a pressure chamber.

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Silence
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Re: 2100 PC expansion?

Post by Silence » Sat May 03, 2008 11:29 pm

Letting the rubber expand more than the conventional limit can weaken it over time. In constant pressure homemade water guns, we're free to let the rubber expand a full 8x in diameter, because latex rubber tubing is cheap and the bladder is easy to replace. That doesn't hold true for commercial water guns, especially CPS ones (which become rarer and rarer with time).

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Hunt_and_Annoy
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Re: 2100 PC expansion?

Post by Hunt_and_Annoy » Sat May 03, 2008 11:37 pm

True. But if that happens k-modding becomes an option.

Has anyone looked into melting LRT and molding it into a spherical PC?

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C-A_99
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Re: 2100 PC expansion?

Post by C-A_99 » Sun May 04, 2008 2:43 am

Removing the casing also makes it more prone to getting scratched, which, over time, even small scratches may develop into tearing which eventually breaks the PC.

Melting... None of us (that I know) have the equiptment to do that with the precision to create a spherical PC that's perfectly even.

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Silence
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Re: 2100 PC expansion?

Post by Silence » Sun May 04, 2008 3:23 pm

Melting would indeed be rather difficult. At any practical temperature, you'd probably end up with a rather sticky, gooey substance. For example, in auto racing, tires partially melt due to friction with the road. I'm not sure what temperatures they reach, but it's rather high and you still only end up with viscous glue.

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Hunt_and_Annoy
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Re: 2100 PC expansion?

Post by Hunt_and_Annoy » Mon May 05, 2008 11:10 pm

Keep in mind race tires are designed not to melt though. Because LRT expands easily I would think the interactive forces between the molecules are easier to break, making it easier to melt.

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Silence
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Re: 2100 PC expansion?

Post by Silence » Tue May 06, 2008 12:48 am

That's true. I don't know if they use any real rubber at all. But still, it would be hard to determine the melting point based solely on the elasticity of rubber. We don't even know the basic elements in LRT! (Although we could easily find out.)

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SSCBen
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Re: 2100 PC expansion?

Post by SSCBen » Thu May 08, 2008 12:02 am

I'm not sure if melting LRT down is the best idea. The rubber itself might not melt down and cool off into the same material. If you can make latex molds it would make most sense (and cost less money) to just buy the rubber material directly and mold from what. I've researched liquid latex before and that seems plausible. I don't know anything about how latex tubing is made though. Try researching the process. I'd do it... but I'm pretty busy for the next two weeks. Maybe I'll look into it more closely after that. ;)

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