Since the Flathead VI uses the same service kit as the other Zeagle first stages, I'm assuming the extra heft is external. If this is correct, would the extra brass make the Flathead VI less susceptible to freeze-up? Am I barking up the wrong tree?
Extra brass on Zeagle Flathead VI = freeze resistance?
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Jimmer
Contributor
The Flathead uses the same parts, but has a better path for air flow through the first stage body, which is why it scores better on the breathing machines, and likely why they needed to use such a large first stage.
You are right though about the heatsink. Copper is one of the best heatsink materials around, and the primary alloying element in Brass is Copper. The additional mass and sruface area should make for a very effecient heatsink. I have done several ice dives and tons of deep cold dives with mine, and have never had even a hint of a freeze up.
Jim
You are right though about the heatsink. Copper is one of the best heatsink materials around, and the primary alloying element in Brass is Copper. The additional mass and sruface area should make for a very effecient heatsink. I have done several ice dives and tons of deep cold dives with mine, and have never had even a hint of a freeze up.
Jim
keyshunter
Contributor
Jimmer,
The latest and greatest Flathead 7 uses a smaller first stage than the VI. Does this mean that the 7 is less resistant to freezing than the VI?
The latest and greatest Flathead 7 uses a smaller first stage than the VI. Does this mean that the 7 is less resistant to freezing than the VI?
Jimmer
Contributor
Well I'm not too sold on the 7 yet. They say they increased surface area when they got rid of some of the bulk of the VI, and they very well may have, but the reduced mass of the 7 wont hold as much heat as the VI does. Also the 7 appears to have some sort of coating on the first stage body. I dont know what the coating is, but I'd be willing to wager a guess that it has the potential to insult the first stage body rather than encourage heat tranfer like bare metal would.
Needless to say I wont be replacing my VI's with 7's anytime soon.
Needless to say I wont be replacing my VI's with 7's anytime soon.
Neither the Flathead 6 or 7 will freeze up underwater. Nor will the 50D, which I dive. The reason is that they all are environmentally sealed and have no water inside them to freeze. There may be a chunk of ice on the outside of one, but that won't freeze the reg.
Jimmer
Contributor
Enviro sealing a reg does not make it freeze proof. Just freeze resistant. I've seen several enviro sealed regs have massive freeflows, I think most of them came down to poor technique on the part of the diver.
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