Re: Re: [PSUBS-MAILIST] pressure compensating ambient

[rjune@fuse.net]

I know this ... but if you pressure compensate based on depth ... i.e. outside depth of 150 ft, pressure compensated = 81.5 psi.
  81.5psi/14.7psi = 5.5 atms from memory that gives you about 1 min at depth before you have to start worrying about decompressing.

Roger
> 
> From: "Herve" <caribsub@coqui.net>
> Date: 2002/09/24 Tue PM 12:33:31 EDT
> To: <personal_submersibles@psubs.org>
> Subject: Re: Re: [PSUBS-MAILIST] pressure compensating ambient
> 
> decompression sickness is impossible up to 1 atm  of increased pressure
> above atmospheric pressure.
> so you can actually have 2 atm inside the sub without any risk of
> decompression sickness
> Herve
> ----- Original Message -----
> From: <rjune@fuse.net>
> To: <personal_submersibles@psubs.org>
> Sent: Tuesday, September 24, 2002 10:30 AM
> Subject: Re: Re: [PSUBS-MAILIST] pressure compensating ambient
> 
> 
> > be carfull ... changing the pressure to above 1 ATM will subject you to
> the posability of decompresion illness.  This is additionaly dangerous if
> you rise to quickly.
> > >
> > > From: Marco Zeeman <marco@zeeman.co.nz>
> > > Date: 2002/09/23 Mon PM 07:01:44 EDT
> > > To: <personal_submersibles@psubs.org>
> > > Subject: Re: [PSUBS-MAILIST] pressure compensating ambient
> > >
> > > Hi
> > >
> > > Following on from Doc's email, has anyone any info on an automatic
> pressure
> > > compensating system for an ambient dry sub. Wanting to keep the internal
> > > pressure a couple of PSI higher than external pressure.
> > >
> > > Keen to learn more about this aspect
> > >
> > > Kind Regards
> > >
> > > Marco
> > >
> > > From the land of the long white cloud.......clear blue sea, whales,
> > > dolphins, mountains, fiords along with plenty more to see.
> > >
> > >
> > > > Anyone have any thoughts on pressure compensating ambient subs?
> > > >
> > > > I'm playing with an idea that, a properly constructed ambient does not
> need
> > > > to match external pressure instantly but rather at a pre regulated
> rate of
> > > > maybe
> > > > 1atm per minute.
> > > >
> > > > I've got that need for speed! There's so much to explore and I just
> don't have
> > > > the
> > > > time or patients to do it at a snails pace.
> > > > The ocean is our greatest frontier, we know more about other planets
> than we
> > > > do our
> > > > own, why?, because a horse and wagon could travel faster than most of
> the
> > > > worlds
> > > > research subs and we're trying to cover 3 times the area!
> > > > I don't want to go beyond 150 feet, my night vision sucks now and
> there's more
> > > > than
> > > > enough for me to discover at that depth or less to feed my curiosity
> for the
> > > > rest of my life.
> > > > If anyone has ever played tag with a shark from the safety of a sub
> and had
> > > > the upper
> > > > hand, then you'll know the kind of thrill to be had in a really fast
> > > > submersible!
> > > >
> > > > I can not say that my curiosity and enthusiasm has always kept me
> safe, I
> > > > believe I have
> > > > been incredibly lucky in my past exploits but increasing age and
> experience
> > > > demands that
> > > > I better my odds if I want to keep doing what I love, and be able to
> hand it
> > > > down to the next
> > > > generation.
> > > >
> > > > Any constructive input would be greatly appreciated.
> > > >
> > > >
> > > > Doc
> > > >
> > > > -----
> > > > If you're not living on the edge, you're taking up too much space.
> > > >
> > >
> > >
> >
> > Roger June
> > REJ and Company
> > rjune@fuse.net
> > 513-300-1189
> >
> >
> >
> >
> 
> 
> 

Roger June
REJ and Company
rjune@fuse.net
513-300-1189