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Hi Brent
I fly helicopters for a living i mainly do whale watching
due to the nature of this flying over water we use pop out inflatable
floats they are
tightly packed above our skids so stremlined that they
hardly effect the aerodynamics of the
machine yet when employed are able to keep the machine
afloat.maybe something to look into.
My 2 cent worth ps thanks for your help.
Glen
----- Original Message -----
Sent: Friday, September 05, 2008 8:11
PM
Subject: RE: [PSUBS-MAILIST] Venting an
Ambient
Hi
Joe,
Sounds like a good plan of
attack to me. Thanks Joe/ A.K.A John Smith.
;)'
That made me think that inflatable pontoons could
also be installed on an ambient sub for better surface stability and egress,
as well as emergency buoyancy when at depth.
Your
resident pipe dreamer
;)'
Regards,
Szybowski
From: joeperkel@hotmail.com
To:
personal_submersibles@psubs.org
Subject:
RE: [PSUBS-MAILIST] Venting an Ambient
Date: Fri, 5 Sep 2008 10:10:16
+0000
Brent,
All of this should be quite calculable, rate of expansion,
pressure increases, venting rate required to remain within parameters, valve
capacity...etc. If one is truly serious regarding building an ambient, then
the best bet is to copy what others have done, IVC, Exomos, Carib,...etc.
The trouble that I found with them is that they are good at giving up
sales data and pretty mum about technical details. You would have to pose as
an interested party and ask the pertinent questions prior to them getting wise
and shutting down on you but, you could get the buoyancy control details from
them this way because you are so "concerned" safety wise!
:)
Joe
From: brenthartwig@hotmail.com
To:
personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Venting an
Ambient
Date: Thu, 4 Sep 2008 21:36:48 -0700
I forgot to add that, if I need to blow air
into the inflatable pontoons to surface, that I can add just enough air to
make the sub start to ascend, much like some PSUBBERS do with there
MBT's. That way as I rise, the air will fill the pontoons, hopefully slower,
and also keep my sub from accelerating as fast in a dangerous manor, and put
less pressure on the interior surfaces as the air expands and tries to get out
of the expansion valves. If I'm really deep then I'll need a better valve
design to deal with the faster changing pressures inside the pontoons when
they get totally full and the sub starts to accelerate. But I still expect to
need a number of expansion valves regardless. I would hate to have the
pontoons pop when ascending, it they are my last option for
lift.
Your expanding air filled dreamer
;)'
Regards,
Szybowski
From: brenthartwig@hotmail.com
To:
personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Venting an
Ambient
Date: Thu, 4 Sep 2008 16:13:52 -0700
Hi Joe,
This point
you made below, is exactly what I want to figure out for my inflatable
pontoons, so I can blow them at depth if I need to in an emergency. Most
of the time I would only fill them up when I get back to the
surface.
"What would a cracking pressure of 0.5
to 2 lbs translate to in hull overpressure, and how many would be required to
dump expansion in an emergency ascent from max depth."
Your resident pontoon dreamer
;)'
Regards,
Szybowski
From: joeperkel@hotmail.com
To: personal_submersibles@psubs.org
Subject:
[PSUBS-MAILIST] Venting an Ambient
Date: Thu, 4 Sep 2008 13:59:49
+0000
Someone asked about venting an ambient.
I found some PVC check
valves today which could quite possibly do the trick but I think you
would have to ask two questions.
What would a cracking pressure
of 0.5 to 2 lbs translate to in hull overpressure, and how many would be
required to dump expansion in an emergency ascent from max
depth.
Otherwise, these look pretty
nifty!
Joe
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