2 drysuit questions

[Lost Yooper]

It really depends on the diving you're doing. I can do a dive in Superior (40F-55F) on air for 75min (total dive time) with 200g Bare underwear and my shell suit and not get too cool. An ice dive is cold enough for argon -- to me anyway. Helium cools you down pretty good too. Is it worth it? I think it is if the other choice is getting cold during a dive. If you're not getting cold during your dives, then it's not worth it -- obviously.

Maiken has a lot of good stuff out there to read. Glad you liked it.

Mike

 

[CheeseWhiz]

:doctor: According to Baumeister and Marks "Standard Handbook for Mechanical Engineers" (7th Edition....tells you how old I am!), thermal conductivity values are as follows:

* Air - 0.0140
* Argon - 0.00915
* Nitrogen - 0.0140

This if the thermal conductivity factor, k, which is in units of (ready for this?) BTU per hour per square foot per degree F per foot.

Aren't you glad you asked?

BTW, chlorine gas is only 0.0043. Just be careful where you are when you vent your suit!

 

[Bob3]

Nice work, now what about Helium?

 

[CheeseWhiz]

He = 0.0818 BTU per blah blah etc etc (give or take a few thousandths of a BTU).

Northern Diver dry suit dealer, eh? I'm in the market for a drysuit and noticed the NDs are pretty cool. How long to get a custom suit from the UK these days?

 

[Bob3]

Takes 4 weeks or so between fab time & travel.
Longer in the spring, when everybody has the same idea.