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

Sat Jan 17 00:58:47 EST 2015

I think that escape from Carsten’s sub is where I would want to be but in a
small P-Sub it is going to require too much air to pressurize.

For example a sub at 48” diameter x 72” length is approximately 80 cubic
feet. 

If you were at 100 meters depth say 10 atmospheres then to pressurize the
cabin to escape would require 10  x 80 cu ft air cylinders.

Even if you flood to half way and then top up with air you will need five 80
cu ft dive cylinders of air.  So chances are that the air would be depleted
by attempts to blow the ballast.

Therefore it is unlikely that you would have enough air to do any
equalization.

For the hoods it looks as though they hold about 10 litres so 2 of them 20
litres and at 10 bar they would need approx 200 litres of air to inflate
fully. Approximately 7 cu ft. So no problem for them.

So a possible procedure for escaping might be:-

Procedure

For 100 meter exit.

1

Get out the Steinke hoods and 3mm wetsuit  

2

Put on Wetsuit

3

Put on Steinke Hood in ready mode with nose clips on. Unzipped

4

Hook on the air fill line to the hood.

5

Isolate the batteries. Turn on dive torch.

6

When both people are ready open the two valves but flood only to 50% full.
33 ft depth equivalent. Should take 20 seconds.

7

Close valves

8

Open hatch dogs.

9

Inflate the Steinkes to full for the 33 ft depth Open valves and fill to
neck line of people. Equivalent 100 ft depth.

10

Put hood over heads ready to exit. And fill vest with air at same time open
sea cocks.

11

When hatch opens disconnect air line and head to surface.

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org]
On Behalf Of "Carsten Standfuß" via Personal_Submersibles
Sent: Saturday, 17 January 2015 4:33 a.m.
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] FW: Escape with Steinke Hoods.

 "SEIE suits to simulate an escape from the Swedish submarine Vastergotland,
down 115 feet off the coast of Denmark. .. and nine seconds required for the
ascent. " 

Means around 13 feet  per second. euqal to 4 m per sec in a Full suit.
Assume Steinke hoods will be simillar. 

Means 200 meter in 50 second. Take a big breath if you get out and than
breath out all the time.. 
No gas gets into your body during the time to get to the surface. No Need
for helium. 
The surfaceing time is to short to get decomprssion thickness - but read the
Pachoa Report again - you can learn a lot from that.
 The as scuba diver escaping crewman died after surfacing because they stay
one and a half hour in the 
chamber under pressure.. in just 40 m deep or so. 

On a german submarine in World war one a crewman escape after a day from 32m
deep wreck without problems.
And without any gear. The guy from the Nekton escape from 80 meter after a
window breaks even without a gear. 
I make  a emergency surfacing from 24 meter as subadiver as my rebreather
stops working because of a broken valve. 

vbr Carsten

Another question is do you need to decompress if using Helium mix in the
short time it takes to get to the surface?   How fast is the ascent in
metres per second with the Steinke flotation.  Hugh

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org]
On Behalf Of "Carsten Standfuß" via Personal_Submersibles
Sent: Friday, 16 January 2015 9:05 a.m.
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] FW: Escape with Steinke Hoods.

The Steinke hood can be use with air, ever in greater deep the time to the
surface will be very short. More serious is the flooding time of the
submarine. 

If you need 20 Minutes to flood the submarine in 100 meter deep (300 feet)
it do not matter any more which gas you have in the hood for 1-2 minutes. 
You will get decompression illness or dead anyway. 

The compression time in the submarine has to be short as possible.
A big flood valve help. Releaseing the rest of you gas from the
boats-bottles at the end of the flooding time into your flood cpompartment
to equalize the pressure help also. 

One drawback of the Steinke Hood is that it is even as expirence sportdiver
nearly impossible to stop the unit at 9 or 6 or 3 m deep for a decompression
stop. 

http://en.wikipedia.org/wiki/BAP_Pacocha_%28SS-48%29

another from the internet: 

Exercise Sorbet Royal

A NATO exercise, Sorbet Royal in May 2002 (Cohen 2003), demonstrated the
effectiveness of the system when four crewmembers and five others from
Denmark, the UK and USA, both men and women, donned SEIE suits to simulate
an escape from the Swedish submarine Vastergotland, down 115 feet off the
coast of Denmark. The submarine’s escape tower had a four to six minutes
recycle time, (determined chiefly the time it takes to drain the flooded
tower) but they used a 15-minute interval for this demonstration. The
exercise worked as briefed, with 18 seconds required for the pressure
equalisation phase, the pressure doubling roughly every four seconds or so,
and nine seconds required for the ascent. Rescue units, including a
decompression chamber, were waiting in smooth seas on the surface.

Vbr Carsten 

"Hugh Fulton via Personal_Submersibles" <personal_submersibles at psubs.org>
schrieb:
> Hi Hank, Comsub has no flood valves and I was going to put one in but
would
> have to weld through the hull.
> My concern is that the effects of narcosis at that depth will be fairly
> severe and that a mixed gas might prevent that and allow clearer thinking.
> Hugh
> 
> 
> -----Original Message-----
> From: Personal_Submersibles
[mailto:personal_submersibles-bounces at psubs.org]
> On Behalf Of hank pronk via Personal_Submersibles
> Sent: Friday, 16 January 2015 2:02 a.m.
> To: Personal Submersibles General Discussion
> Subject: Re: [PSUBS-MAILIST] FW: Escape with Steinke Hoods.
> 
> Hugh,
> My understanding is, use regular tank air because your bottom time is so
> short. One of the members posted an allowable time chart for flooding. I
> think it is something like 1min 30 sec for 400 feet.
> Does Com Sub have a flood valve, Gamma never did until I put one in.
> Hank
> --------------------------------------------
> On Wed, 1/14/15, Hugh Fulton via Personal_Submersibles
> <personal_submersibles at psubs.org> wrote:
> 
> Subject: [PSUBS-MAILIST] FW: Escape with Steinke Hoods.
> To: "'Personal Submersibles General Discussion'"
> <personal_submersibles at psubs.org>
> Received: Wednesday, January 14, 2015, 10:51 PM
> 
> 
> 
> 
>  
>  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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