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--0-1714636915-953661135=:24831 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Note: forwarded message attached. __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com --0-1714636915-953661135=:24831 Content-Type: message/rfc822 Received: from [208.212.83.68] by web218.mail.yahoo.com; Mon, 20 Mar 2000 13:43:58 PST Date: Mon, 20 Mar 2000 13:43:58 -0800 (PST) From: "Michael J. Black" <mjblackmd@ya*.co*> Subject: Re: Helium To: Aquanaut Mail <techdiver@aquanaut.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Length: 1390 Have been gone for a few days, diving, and came back to find that helium has a higher heat capacity and heat conductivity than air, but doesn't heat up as much because it is less dense (lower mass for the same volume). Is that about right? and if so why didn't someone just say so in the first place? Now we know helium, being the rapid diffuser that it is, is quicker to off-gas than nitrogen. And if you're worried about slow nitrogen desaturation after a dive, and want to minimize risk of bubble formation (of any gas), then it would be ideal to replace the nitrogen with helium. So going back to Ben Wiseley's original question: assuming cost is no object, the ideal mix for a 60ft dive is heliox, because nitrogen desat. is eliminated completely. And I could safely do my bike race the next day, or even that afternoon. Agree? Would like to hear from someone who has done this. No rants please (in other words, no Scott posts, i.e. information only without anencephalic gibberish). I know someone's going to shout trimix you idiot, but the goal is to quickly eliminate the risk of bubble formation, completely. Also, to avoid confusion about insulating gas, let's assume it's a wet suit dive (or a dry suit dive with Argon). MJB __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com --0-1714636915-953661135=:24831-- -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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