[PSUBS-MAILIST] FW: Escape with Steinke Hoods.

[Hugh Fulton via Personal_Submersibles]

Hi Emile,  Scuba connectors make sense.  New sub has 2 x 1.0" valves.
Originally had 2 x 2" valves but I was concerned that while fast looked good
the last pressurization from say 5 bar to 12 bar will be very fast because
of reduced amount of water to increase that pressure.  If you are in shallow
water say under 100 ft then I think large is good but if it takes 33 seconds
to reach full pressure  it will take only approx half that to increase from
33 ft equivalent at half full.  That is diving at a rate of 360 ft in 15
seconds.  I am concerned that maximum diving speed is 90 ft / minute which
is why I downsized my valves to the 2 x 1.0".

I found this programme for estimating flooding times from I cant remember
where but it gives out some numbers.  Hugh



 

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org]
On Behalf Of Emile van Essen via Personal_Submersibles
Sent: Friday, 16 January 2015 6:56 a.m.
To: 'Personal Submersibles General Discussion'
Subject: Re: [PSUBS-MAILIST] FW: Escape with Steinke Hoods.

 

Hugh,

 

We changed the couples for standard Scuba ones. I don't bother about the gas
as  the time should be very short. Not said this is the best.. Anyway the
Flood valve should be BIG. A. 1"ballvave is way to small.

 

Emile

 

  _____  

Van: Personal_Submersibles [mailto:personal_submersibles-bo
<mailto:personal_submersibles-bounces at psubs.org> unces at psubs.org] Namens
Hugh Fulton via Personal_Submersibles
Verzonden: donderdag 15 januari 2015 4:52
Aan: 'Personal Submersibles General Discussion'
Onderwerp: [PSUBS-MAILIST] FW: Escape with Steinke Hoods.

 

 

 

Hi Guys,

My two Steinke hoods turned up. Made in USA 1982. Still in good condition.
I  have looked at the escape training video which was great. Questions.  It
is obvious you need a fill hose for the initial fill at depth prior to
opening the hatch.  i.e. if you are at 10 atmospheres depth then you need to
fill it with 10 atmospheres (bar) pressurised air. 

1.       How many of you are adding a Steinke fill hose with an Aro coupling
for this purpose.  

2.       Breathing this will give you narcosis.  So is it better to have 2
bottles of mixed gas for this purpose? One for 8-15 bar depth escapes and
one for 16-25 bar depth escapes.  Air could be used up to 8 bar.

3.       What are the mixes recommended for these depths to prevent narcosis
as it could take 5 minutes to pressurise and escape. 

Chs  Hugh.

 



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