Mailing List Archive Mailing List Archive
From: Matthias Voss <mat.voss@t-*.de*> > The price for one suit was 500,- DM, for the other 800,-DM , I believe. That's about $1050/$1680USD. Yikes! > > The pack connects to the suit, has a temperature control, and is available > > with several mounting options. > > How it does that without punching a hole in the drysuit or making a seal > > into a leak is a mystery to me. > > They do not a through connection to inside the suit ? > I have seen wireless transmission with charging devices, but in this > application I would chose to make a neat connection to the suit. The company says "no modification to the drysuit." They may use Voodoo and provide you with a bag of chicken bones for field use. I've seen SONAR systems that worked that way. :) The wireless charging I have seen is done by sending an AC magnetic field through the case. It isn't all that efficient, but one avoided case of flooding a housing can pay for quite a bit of power loss. I think I would go for a through-suit connection too. It would be much easier to manage in an entanglement. > > > There was also a suit who's designer claimed a capability of chemically > > > storing latent enrgy and rendering heat in the very moment the > > > temperature dropped below a trigger point. You may have seen this very > > > design with cars, where the cooling system serves to heat > > > natriumsomething crystals, which in turn give this energy back on > > > demand. > > > > If you could have a material with a melting point around 90 degrees and > > enough specific heat, you could wear a vest of the stuff under your drysuit > > and go the first part of the dive on sensible heat and the rest of the dive > > on the latent heat given off as the material solidifies. I know of no > > material with a high enough specific heat to do that. > > That was exactly how they said it would work. The crystals were said to > be "woven in " within the fabric. I would expect it to require quite a bit more mass than one could get into a fabric. Since I don't have one, I'll assume it didn't work out very well. :) > > The thing about this rig that got my attention was that the suits put no > > heat on the head, hands, or feet. The heating element is at the spine. > > May be there is good reason for this. If you feel the cold, your body > can react to it and economize. > The spine is susceptible to cold, without the need to feel it there, > _because_ you already feel it at your more exposed limbs. > People die in the water when temperatures at the upper spine ( > especially C1 to C ** drop below a certain level, which in turn affects > motion and breathing. > So heating the spine may be beneficial, and economic. Makes sense. My knowledge of physiology is pretty limited. > The company was Robin Hood Watersports ( ROHO)from UK. At those prices, they go to the bottom of my "to-do" list. :) Don Shop online without a credit card http://www.rocketcash.com RocketCash, a NetZero subsidiary -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]