Nobody warned me..
03-19-09, 01:16 PM
#51
Look at all these buttons
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LMAO @ this thread.
1. People are complaining about how frozen their hands got.
2. People refused to buy a sheilded trigger CO2 charger "because it was bulky"
3. People then find a coozie for a CO2 cartridge.
4. People discuss how they are "staying away" from CO2 because its "dangerous?"
5. People are trying to talk about how mini pumps are better than CO2.
If I was on a group ride and someone flatted and pulled out a mini pump, I'd walk over and be like watch out, and co2 their damn tire.
This is the same reason 90% of modern cyclists will argue that clinchers are better than tubulars. Not because they've actually ridden either of them, but because they're afraid to try them because its different.
lulz.
1. People are complaining about how frozen their hands got.
2. People refused to buy a sheilded trigger CO2 charger "because it was bulky"
3. People then find a coozie for a CO2 cartridge.
4. People discuss how they are "staying away" from CO2 because its "dangerous?"
5. People are trying to talk about how mini pumps are better than CO2.
If I was on a group ride and someone flatted and pulled out a mini pump, I'd walk over and be like watch out, and co2 their damn tire.
This is the same reason 90% of modern cyclists will argue that clinchers are better than tubulars. Not because they've actually ridden either of them, but because they're afraid to try them because its different.
lulz.
03-19-09, 01:18 PM
#52
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What wrong with a cartridge koosie? Keep it from banging around in seat bag, too.
Anyway, I'm pretty shaky on my thermodynamics, but I think the CO2-tube problem is one of adiabatic expansion: https://en.wikipedia.org/wiki/Adiabatic_process for more explanation. (It's complicated.)
Edit: the phase change from liquid to gas is probably chilling the cartridge more than the gas expansion.
Anyway, I'm pretty shaky on my thermodynamics, but I think the CO2-tube problem is one of adiabatic expansion: https://en.wikipedia.org/wiki/Adiabatic_process for more explanation. (It's complicated.)
Edit: the phase change from liquid to gas is probably chilling the cartridge more than the gas expansion.
Last edited by Phantoj; 03-19-09 at 01:29 PM.
03-19-09, 01:19 PM
#53
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I would say that 100% of modern cyclists have ridden either of them.
03-19-09, 01:25 PM
#54
Senior Member
Living in San Diego, I don't worry about freezing my fingers too often. The duct tape is for whatever you might need duct tape on a bike for. I'd carry the full sized roll in my pocket but I need it for a cup holder in my truck.
03-19-09, 01:26 PM
#55
squid
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What wrong with a cartridge koosie? Keep it from banging around in seat bag, too.
Anyway, I'm pretty shaky on my thermodynamics, but I think the CO2-tube problem is one of adiabatic expansion: https://en.wikipedia.org/wiki/Adiabatic_process for more explanation. (It's complicated.)
Anyway, I'm pretty shaky on my thermodynamics, but I think the CO2-tube problem is one of adiabatic expansion: https://en.wikipedia.org/wiki/Adiabatic_process for more explanation. (It's complicated.)
That's what i was waiting for. A little above high school level in most places 
03-19-09, 01:29 PM
#56
Senior Member
03-19-09, 01:40 PM
#57
NYC
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If that isn't it, it is very close. I don't have it with me right now and that's the closest pic I could find. As far as where to hold it, I was pretty much doing exactly as you say. My right hand was holding the canister and applying pressure to keep the adapter in contact with the valve. I used my left hand to push down on the spring valve (green area) to allow the air into the tube. This resulted in the canister frozen to my glove.
With the spring nozzle, all you have to do it push it onto the valve stem.
So I use one hand on the cartridge, and one hand supporting squeezing the tire down onto valve stem to give it enough force to push the spring, being careful to not unseat the bead on the tire.
I give it just the slightest shot of air, then check the bead. Then put the rest in. The stem usually frosts, but that's it.
You probably had escaping gas at the valve since you were reducing the seal force by pulling up the green ring. THAT'S probably what flash froze the surfaces.
03-19-09, 01:44 PM
#58
Hills hurt.. Couches kill
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LMAO @ this thread.
1. People are complaining about how frozen their hands got.
2. People refused to buy a sheilded trigger CO2 charger "because it was bulky"
3. People then find a coozie for a CO2 cartridge.
4. People discuss how they are "staying away" from CO2 because its "dangerous?"
5. People are trying to talk about how mini pumps are better than CO2.
If I was on a group ride and someone flatted and pulled out a mini pump, I'd walk over and be like watch out, and co2 their damn tire.
This is the same reason 90% of modern cyclists will argue that clinchers are better than tubulars. Not because they've actually ridden either of them, but because they're afraid to try them because its different.
lulz.
1. People are complaining about how frozen their hands got.
2. People refused to buy a sheilded trigger CO2 charger "because it was bulky"
3. People then find a coozie for a CO2 cartridge.
4. People discuss how they are "staying away" from CO2 because its "dangerous?"
5. People are trying to talk about how mini pumps are better than CO2.
If I was on a group ride and someone flatted and pulled out a mini pump, I'd walk over and be like watch out, and co2 their damn tire.
This is the same reason 90% of modern cyclists will argue that clinchers are better than tubulars. Not because they've actually ridden either of them, but because they're afraid to try them because its different.
lulz.
I still think it had to do with the dewpoint / temp spread and the fact I was wet from the rain. (Oh and all that Physics stuff too)
03-19-09, 01:47 PM
#59
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Another nice thing about these units is that you can use 12 or 16 gram cartridges, threaded or non-threaded.
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03-19-09, 01:51 PM
#60
Hills hurt.. Couches kill
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Ah, there is the problem.
With the spring nozzle, all you have to do it push it onto the valve stem.
So I use one hand on the cartridge, and one hand supporting squeezing the tire down onto valve stem to give it enough force to push the spring, being careful to not unseat the bead on the tire.
I give it just the slightest shot of air, then check the bead. Then put the rest in. The stem usually frosts, but that's it.
You probably had escaping gas at the valve since you were reducing the seal force by pulling up the green ring. THAT'S probably what flash froze the surfaces.
With the spring nozzle, all you have to do it push it onto the valve stem.
So I use one hand on the cartridge, and one hand supporting squeezing the tire down onto valve stem to give it enough force to push the spring, being careful to not unseat the bead on the tire.
I give it just the slightest shot of air, then check the bead. Then put the rest in. The stem usually frosts, but that's it.
You probably had escaping gas at the valve since you were reducing the seal force by pulling up the green ring. THAT'S probably what flash froze the surfaces.
03-19-09, 01:59 PM
#61
Farmer tan
Ideal gas law does not apply to phase change. Any AC / Heating contractor can tell you that.
BTW, I froze my fingers with that very same CO2 chuck the first time, so it definitely takes more than higher education to figure this out. Maybe some common sense?
BTW, I froze my fingers with that very same CO2 chuck the first time, so it definitely takes more than higher education to figure this out. Maybe some common sense?
Last edited by f4rrest; 03-19-09 at 02:02 PM.
03-19-09, 02:03 PM
#62
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So you're saying it gets colder because the phase change is endothermic?
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03-19-09, 02:09 PM
#64
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You want simple? You're in the wrong forum!
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03-19-09, 02:10 PM
#65
i ride a bicycle
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Mac
03-19-09, 02:12 PM
#66
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Really, all your gas-law latent heat of evaporation mumbo jumbo is going to get you is the temperature of the gas. But you don't get frozen by the gas, you get frozen by the little cylinder.
Bottom line (to me) is that the cylinder gets flippin' cold, and if you have wet hands, they're going to freeze to it.
Bottom line (to me) is that the cylinder gets flippin' cold, and if you have wet hands, they're going to freeze to it.
03-19-09, 02:13 PM
#67
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Where did you pull this tidbit from? Virtually all the compressed CO2 that we use is captured as a by-product of other industrial processes. Since it would otherwise be waste that would either be a pollutant, or cost money to eliminate, bottling it and selling it seems like a particularly good way to deal with it...
Mac
Mac
03-19-09, 02:18 PM
#68
Farmer tan
Are you kidding? Armchair science makes its way into almost every BF thread: from Simple Green cracking chains to timmyquest's epic thread on weight-saving upgrades. Take away the "science", you'd take away half the amusement!
03-19-09, 02:19 PM
#69
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Where did you pull this tidbit from? Virtually all the compressed CO2 that we use is captured as a by-product of other industrial processes. Since it would otherwise be waste that would either be a pollutant, or cost money to eliminate, bottling it and selling it seems like a particularly good way to deal with it...
Mac
Mac
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"When you are chewing the bars at the business end of a 90 mile road race you really dont care what gear you have hanging from your bike so long as it works."
ΛΧΑ ΔΞ179 - 15% off your first Hammer Nutrition order!
03-19-09, 02:20 PM
#70
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this is what happens when botto gets banned.
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03-19-09, 02:38 PM
#71
Farmer tan
03-19-09, 02:41 PM
#72
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03-19-09, 05:49 PM
#73
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03-19-09, 06:07 PM
#74
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After listening to crackheads ramble for the last two hours at work, I decide to take a break and check the forums..... now I kinda wish I opted to hang out with the crackheads. Oh you crazy BF'ers
03-19-09, 06:08 PM
#75
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I have one of these, and it works ok, but a friend of mine has one I like much better: it's about the same size as this one, but has a valve on the back. Once you screw in the C02 cartridge, you open the valve, slowly, and it fills the tire. I like how controllable it is. I haven't been able to find one of these, so if someone knows what I'm talking about, can you post a link?
