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

Thu Jan 15 16:43:47 EST 2015

Alan,  20 minutes is out of the question.  2 minutes is too much but the possibilities of ruptured ear drums is there.  The big thing I have heard is the cold and the narcosis.  They found a lot of bodies half out of the hatch in war subs.  Hugh

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan James via Personal_Submersibles
Sent: Friday, 16 January 2015 10:13 a.m.
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] FW: Escape with Steinke Hoods.

If it takes 20 minutes to flood the submarine, then the first 10 minutes

will half fill the sub, at which point you will be at the equivalent of 33ft.

So no problem of decompression sickness to this stage. It just gets

exponentially worse as you continue to flood & the pressure differential

between inside & outside gets less making the filling slower.

As Phil says, you need to add air for the last part.

One of my worries is that you will blow your ear drumbs with no control

of the flood valve. 

Would be really good to have some sort of simulator program that told

you what was happening at various depths & what the dangers of

narcosis & decompression sickness were.

Alan

  _____  

From: "Carsten Standfuß" via Personal_Submersibles" <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Friday, January 16, 2015 9:05 AM
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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