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Old December 20th, 2012, 17:44   #21
Join Date: Jul 2011
Location: Mississauga, Ontario.
Originally Posted by Ricochet View Post
My statement "it's physics" was in response to Styrak's constantly telling me the same thing. And although chemistry is the study, physical properties are at play here. Thank you for the detailed explanation though, you made things much clearer than I could have, and I use to work with propane. However I stand by my statement that propane in liquid form can come in higher pressures. I believe I read that depending on it's purpose, propane can be acquired at higher compression; which I do remember from my course. I have consistently had guns shoot hotter on green gas as well. What's your thoughts on that point? Better yet, has anyone had the same or differing experiences with propane versus green gas FPS wise? And if so what brands did you use?
Excellent response sir. First let me say that I know Stryak started it lol, I just had to correct everyone being the science nerd I am. Just for the sake of absolute clarity, it is actually still chemistry even though you are looking at physical properties. Although I guess it could be considered to branch into some areas of physics such as thermodynamics or fluid laws.

Propane CAN be compressed to higher pressures, but under rather extreme conditions and my guess would be it would only practical in industrial-sized applications, perhaps when storing large amounts as fuel.

Most interesting point is how some Green Gas will perform differently from propane. I believe Stryak had the answer here, they are adding other gases than propane (C3H8) to the mix for whatever reason. Therefore the vapor pressure inside the magazine will be slightly different than a pure propane fill, giving the observed 10-30 fps variation.

Another point to make is that even if the fill container was 'supercharged' (and it's not) the transfer of gas into the magazine would negate any benefit. Any leaks from the valve during the fill, as well as the expansion and subsequent cooling would result in incomplete filling of the magazine. This would give the normal vapor pressure inside the magazine, even if the fill container was at higher than normal pressure.

God I love science lol
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