I have to say that every single person here would push the envelope
to save another human life, whatever it involves, I did it for the better part
of twenty years as a fire fighter and Paramedic and after every call I said wow
that could have been really bad the bell rings and you do it all over again, I
have done a couple bounce dives in the keys to 200 feet, and the 6 dollar high
(nitrogen narcosis ) you just have to control your thoughts and do it, but as
age and weight comes on I will be doing it at 1 ATM from now on unless needed
to save lives
Brian V. Ryder
brian@subatlantic.com
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From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Alan James
Sent: Sunday, July 04, 2010 9:07 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] K250 to K400 modification
On
a serious note, I agree with you regarding Hugh.
He's
doing this submarine thing a couple of levels above me.
I'm
just building for recreational purposes & in my spare time.
Hughs
putting a lot on the line with his commercial build.
Nailing
down all the facts & building to ABS specifications
with
an original design must be incredibly difficult & frustrating.
Hugh
(who lives across town) is very safety conscious & lets
me
know if I'm out of line.
-----
Original Message -----
Sent: Monday, July 05,
2010 10:50 AM
Subject: Re: [PSUBS-MAILIST]
K250 to K400 modification
So....what?
Hugh isn't smart or brave? Hm. I had quite a different impression of him.
-----Original Message-----
From: Alan James <alanjames@xtra.co.nz>
To: personal_submersibles@psubs.org
Sent: Sun, Jul 4, 2010 6:12 pm
Subject: Re: [PSUBS-MAILIST] K250 to K400 modification
It's dangerous if it's not thought through properly &
the dangers are not accounted for.
----- Original Message -----
Sent: Monday, July 05, 2010 7:17 AM
Subject: RE: [PSUBS-MAILIST] K250 to K400 modification
Alan, Fair enough you did put in an emergency but I would put
more faith in tech divers as they are familiar with the complex tables mixing
of gas etc. 150 ft extra you would probably be narc’d. It is
possible but so is flying in a chair tied to a bunch of helium balloons.
Dangerous stuff. Hugh
If you look at it carefully you'd see that you'd only
need the decompression times for a 150ft dive.
----- Original Message -----
Sent: Sunday, July 04, 2010 11:23 AM
Subject: RE: [PSUBS-MAILIST] K250 to K400 modification
That would have to be the silliest idea you have come up
with. Heard of bends, decompression?
I am thinking that it would be possible to turn a K250 or any
sub
into a semi-ambient for an emergency situation where you needed
Example --- Go down to your 250 ft limit & turn on an ambient
system
at that point, this pressurizes the cabin as you
progressively descend.
Theoretically you could go another 150ft, down to 400ft.
I guess you'd need a lot of tanks for a K250. Maybe more practical
for
Cliffs sub wich is a bit smaller. You would need a dive computer
for
decompression calculations, an over pressure valve, a modification
of
the life support system wich could be as little as increasing the
O2
flow into the cabin. Also the instrumentation would need to take
75psi.
The ambient equalization system could be set up by having a
outside
pressure reading & an electronic system that fed air into the
hull when
the outside pressure was more than 125psi above the inside.
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