Mailing List Archive Mailing List Archive
Don, I would like very much to agree to your currency conversion, unfortunetely it is the USD which is at the strong side of the equation. So it is more like USD 235/ 375 for the suits. regards Matthias Don Burke schrieb: > > 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]