O2BBubbleFree
Contributor
Never mind.
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Neither do I. Long exposure is let's say 30 minutes and it's in range of rec/tech.Woody88:We are not talking about saturation or commercial diving. This is a discussion about rec/tech diving.
I'm not sure about that. Personaly, I don't hear much difference between 35% and 70% of He in mix.Woody88:Yes you will but the point was the more HE in the mix the more this will be an issue. Obviously a 30% mix will have less distortion than a 79% heliox mix.
That's why I highly apreciate Rick's opinion: you can't learn diving on Internet. I gave you an explanation about two efects when breathing He and you qoute me an artical which explains only one. There's no substitute for real course and that's why there's no point of discussing such things on the net.Woody88:HE does have more of a cooling effect on the body. Take a look at this article.
http://www.scuba-doc.com/HPNS.html
MonkSeal:Neither do I. Long exposure is let's say 30 minutes and it's in range of rec/tech.
MonkSeal:That's why I highly appreciate Rick's opinion: you can't learn diving on Internet. I gave you an explanation about two effects when breathing He and you quote me an article which explains only one. There's no substitute for real course and that's why there's no point of discussing such things on the net.
Edit: I saw from your profile that you were trimix certified. Than you should be familiar with my explanation of total termal loss for air and He based mixes.
It's my mistake - I haven't updated my profile. Regarding DIR-F it hasn't been recently.Woody88:Yes I am trimix certified. And from the looks of it you recently completed DIR fundamentals and are not mix certified.
Obviously you class hasn't taught you a lot.Woody88:You are the one who needs to take the class and learn about the technicalities of it.
You obviously haven't met any GUE instructor and you don't have any clue about GUE classes. And I don't understand what GUE has with you not understanding basics of physics and physiology.Woody88:GUE's are militant and not taught to think outside the box anyways.
Although some people are not worth of words I'll qoute it again. If you can understand it - good for you.Woody88:BTW, what were the two effects?
MonkSeal:He mix will be colder than air when entering the lungs due to heat loss from cylinder to lungs (lower molecular density of He - better heat transmition). But due to grater density air can conduct more heat over a relative volume of gas contributing more to core heat loss then He based mix. These two efects seem to counteract one another giving the similar termal loss for both air and trimix.
Thanks Maria - solved with Snowbear.mania:Woody88 - according to ToS personal attacks are not allowed. MonkSeal also - please stay within ToS.
Mania
PS. BTW - He as a breathing gas doesn't make your body cold - MonkSeal is right.