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Old March 28th, 2007, 19:54   #1
Double Tapper
 
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oh no! a gas question

i hate to ask,but i was getting confused here when i was looking at this chart.


it says DUSTER GAS hfc 134a 71psi
GREEN GAS n/a 100psi propane?
BLACK GAS hc 1270 138psi propane?
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Old March 28th, 2007, 20:00   #2
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PropEne
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Old March 28th, 2007, 20:01   #3
ILLusion
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What's your question?

Green gas is propane.
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Old March 28th, 2007, 20:05   #4
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so it wasn't a typo,it is propene,cause i was looking at the tanaka 870,
it took shells and said it uses 134a,you could use green gas if you dared,
that is what the reveiw said,so i wondered how much pressure difference
there was,thanks for the quick response
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Old March 28th, 2007, 20:39   #5
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One of the local guys last year said that he used green gas for CQB as it was about 20psi lower than propane. I know it's one in the same, but anyone else hear this? The dude in question isn't a noob by any means, I just found it curious when he said it.
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Old March 28th, 2007, 20:47   #6
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The word is propane, with an 'a'. Google it. The list is wrong.
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Old March 28th, 2007, 21:03   #7
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I did a test with my KJW MK1 NBB carbine and JKW MK1 NBB pistol, I used duster, propane, and green gas, with .2gr bb's and used a Guarder SPEEDER-2000 Shooting Chrony. I used the same mag with both guns this way it can't be said that the two different mags had differences in the valves releassing different amounts of gas, and I did this in my basement at 22 degrees. I fired a few shots with each gun with each gas and took the average, and this is what I got as a result -

KJW MK1 NBB carbine -
duster - 303fps
green - 530fps
propane - 561fps

KJW MK 1 NBB pistol -
duster - 244fps
green - 391fps
propane - 393fps

The brands that I used were - duster - Falcon Dust Off, green - Jet, propane - Coleman. When using duster there is a massive drop off in fps, almost half, which seemed a bit on the odd side, but at least it brought my carbine down to field limits, and the gun itself is stock right out of the box, no aftermarket upgrades.
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Old March 28th, 2007, 22:32   #8
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green - 530fps
propane - 561fps
sweet.
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Old March 28th, 2007, 22:53   #9
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Originally Posted by Greylocks View Post
The word is propane, with an 'a'. Google it. The list is wrong.
Funny, I thought I passed my Propane ticket...





Yep, I did!

You know Grey, I would have ACTUALLY goggled it before telling everyone else too. Its a different gas.

More info! :
http://en.wikipedia.org/wiki/Propylene

Actually, it'd be a good choice for gas in the GBB's, its "odorless." NO MORE CABAGE SMELL! Just not as easy to stock up on. Nor is it as in-expensive as Propane.

Oh, any of you pipe fitters out there? You might come across this stuff more often, down in the states it is the Yellow bottle for soldering torches doing copper piping.
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Old March 28th, 2007, 23:00   #10
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It's still spelled Propane in this country.

Correct, pure propane has no smell at all. That's added later for safety reasons.

http://en.wikipedia.org/wiki/Propane

http://en.wikipedia.org/wiki/Propylene (aka Propene)

There is a difference. Cheers.

(Yes, I guess you could use both, so we're both correct. But propAne is commonly available here. I'll let the chemistry majors tell us if both have the same properties for what we do with it).

Last edited by Greylocks; March 28th, 2007 at 23:02..
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Old March 28th, 2007, 23:03   #11
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Quote:
Originally Posted by Dracheous View Post
Actually, it'd be a good choice for gas in the GBB's, its "odorless." NO MORE CABAGE SMELL! Just not as easy to stock up on. Nor is it as in-expensive as Propane.
Propane is odourless too. Odour is added by the bottling company as a safety feature, and I'm betting it's the same with propene/propylene.
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Old March 28th, 2007, 23:09   #12
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Originally Posted by Greylocks View Post
It's still spelled Propane in this country.

Correct, pure propane has no smell at all. That's added later for safety reasons.

http://en.wikipedia.org/wiki/Propane

http://en.wikipedia.org/wiki/Propylene (aka Propene)

There is a difference. Cheers.

(Yes, I guess you could use both, so we're both correct. But propAne is commonly available here. I'll let the chemistry majors tell us if both have the same properties for what we do with it).


Propene is not Propane. They are two different gasses, just look at the chemical compound

Propane = C3 H8
Propene = C3 H6


You can not just say "goggle it" they "spelled it wrong" when thats simply not true. They are two different gases.


Mantalope; your right, make a correction to my statement, NO MORE CABBAGE SMELL! WELCOME THE WONDERFUL SMELL OF GARLIC!
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Old March 28th, 2007, 23:18   #13
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Okay, they spelled propene right because it exists. But is that what they really use or is it a typo?

Maybe they can get the propene easyer than we can get the propane? Propane would be far more flammable with more hydrogen atoms.
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Old March 29th, 2007, 00:12   #14
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Originally Posted by Greylocks View Post
Okay, they spelled propene right because it exists. But is that what they really use or is it a typo?

Maybe they can get the propene easyer than we can get the propane? Propane would be far more flammable with more hydrogen atoms.
Brazing Fluid, go to CT. I only said that its not as cheap as Propane, because its a different head as far as I know. So the propane adapters we have will not fit the bottles. In the states the bottles are colour coded to be Yellow, here I have a bottle that is red and a bottle that is black in my garage right now.



The point to the arguement here Grey, ya need to look before you leap. Cause Propene DOES exist, so you can not pass it off as a spelling error or not what they meant. As for how they used it, that I do not have the answer for, but if the guy from Airsoft Innovations can make adapters, I'm sure he's not the only one out there that can work a machine shop. ((His name eludes me right now)).
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Old March 29th, 2007, 00:15   #15
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Quote:
Originally Posted by Greylocks View Post
Okay, they spelled propene right because it exists. But is that what they really use or is it a typo?

Maybe they can get the propene easyer than we can get the propane? Propane would be far more flammable with more hydrogen atoms.
Green gas = propane
Black gas = propene

Its not that one is easier to harder to get, their both different gases at different pressures.

Also just because Hydrogen (H2) is flammable that doesn't mean that everything with hydrogen in it is flammable. Water is H2O but extinguished fires, so just because propane has more hydrogen doesn't mean its more reactive. Because of the double bond between carbon atoms in propene wouldn't that make it more reactive (more flammable)? Asking the chemists out there.
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