Propylene and GBBR's anyone tried it?

[ShelledPants]

Originally Posted by MaciekA

Possibly a dumb question on my part, but is there some way to mix gasses of this kind to "blend" their temperature->pressure properties depending on the desired application?

Not a dumb question. It will technically work.

HOWEVER: Blending of corrosive / explosive gasses can be extremely dangerous. (Read: Explosive)

[MaciekA]

Originally Posted by ShelledPants

Not a dumb question. It will technically work.

HOWEVER: Blending of corrosive / explosive gasses can be extremely dangerous. (Read: Explosive)

With my extremely limited knowledge I'm guessing getting the mix ratio perfectly right is probably not easy from a "regular Joe" usability point of view either.

Side note..

Has anyone thought about somehow keeping the gas warm until the moment right before use?

A player could maybe carry around a large LiPo somewhere on their rig that powered a Peltier heater, or maybe a set of them, wrapped around mags. Peltier-based heaters can be very very compact. You could imagine lining a bunch of mag pouches with them. You would need to ensure good thermal conductivity to your mags as well as insulating your rig reasonably well (if playing in much worse cold for example).

If something like that could work, then the mag would only begin to really experience significant cooldown during actual shooting and/or while inserted into the magwell.

Perhaps someone could make a sort of Mag pull style accessory for the winter, i.e. "Mag Booties", where you wrap the mag in some kind of thermally-insulating jacket. Combine this with a Peltier plate, and Propene, and just maybe it would be enough for a game.

Over in AEG land, I've been looking into insulating my AEG's full stock during winter time, or maybe even wrapping the entire stock in something like Thinsulate or some kind of Fleece, to keep it toasty during games when the temperature sags well below zero. With the MOSFET sharing the same space as the battery and getting quite warm during lively semi-auto fire, there's a chance I could get a decent stable temperature in there. I would love to stuff an Arduino unit or something in there during testing and actually gather some data.

[DustMagnet]

Could you just drop some hand warmers into your mag pouches?

[Basic-Wedge]

I use a blend of duster gas (HFC-134a) and propane on extremely hot days (28℃ and above). I give each mag a good two second shot of duster, then top it up with propane. This blend keeps the velocity from spiking in the heat. You could also run pure duster, but that'll take a good 100 fps off the BBs.

[Spike]

The problem with that is, what about the mag in your gun? It'll get cold unless you're a mag-a-kill kind of person (and if you are, I hate you).

[MaciekA]

Originally Posted by Spike

The problem with that is, what about the mag in your gun? It'll get cold unless you're a mag-a-kill kind of person (and if you are, I hate you).

If it's an M4, Mag Booties / Thermal jacket for the mag.

If it's a pistol, then it stays holstered in the cozy area in your jacket until it is needed. When returned to holster, it starts to re-warm the rapidly-cooling mags.

These aren't ideal but I think it would be worth testing out how far we can get this winter.

[DustMagnet]

Originally Posted by Spike

The problem with that is, what about the mag in your gun? It'll get cold unless you're a mag-a-kill kind of person (and if you are, I hate you).

How about just fabric-taping a handwarmer to each mag? That way they travel with the mag, whether in pouch or in the gun.

[paulwes83]

Not to defend Fox, but his altitude might have had an effect on his GBBR's performance. Argentina is quite mountanous, so if he was playing at a much higher elevation than most of us, it might've worked for him as gases expand differently at different altitudes. Either way, we Canucks need alternatives to propane, pants down, cause shiz gets really friggin cold here.

[TheSarge]

I read this thread last month and I thought I would give this stuff a try. It works amazing. I tried it out last night and tonight with my closed bolt WE M16 it was about 5-8 degrees celsius. I have tried propane in about the same conditions maybe a little warmer and I have experienced serious double feeding and random bb flight paths. Propylene is by far superior to propane in my books.

[LongStone]

I picked up a small can of bernzomatic MAPP but the AI adapter doesn't work with it :-/
(valve is too deep in the throat of the fitting.
any one used a brand that is compatible with the AI or metal adapters?

[Brian McIlmoyle]

Warming mags,

Lots of people have tried this... The issue is the mags generate their own cold as the gas in the mag phase changes from liquid to gas. One, two shots in the mag is down to ambient external temp .. The cooler that is .. The lower the expansion pressure.. So if you marm a mag, it will be primed for the first few shots, and then it will perform the same as a cold one.

I am interested in the propylene results and will try it

[Basic-Wedge]

I use this size of propylene fuel:

The tank is a handy size I can easily carry in my web gear. It also works fine with the AI plastic adapter.

[LongStone]

damn :-/ bottle looks almost exactly the same as mine but marked as "max power" rather than "quick fire", I'll have to bring the AI adapter next time I pick up a bottle