Re: [PSUBS-MAILIST] question about Diver Lockout.

["Jeremy Crawford" <ISMASC@hotmail.com>]

Thanks Carsten and everyone else who responded. My understanding is a little
better now. a little disappointed that it is not so easy as release pressure
and voila!

regards,
Jeremy


----- Original Message -----
From: "Carsten Standfuss" <MerlinSub@t-online.de>
To: <personal_submersibles@psubs.org>
Sent: Wednesday, May 21, 2003 8:18 AM
Subject: Re: [PSUBS-MAILIST] question about Diver Lockout.


> It will work in the Euronaut the following way :
>
> Exit hatch on the bottom is closed
> Transfer hatch to inside Sub is closed.
>
> Pressurezieds the chamber to ambient with air or heliox according to the
> deep.
> Check with manometer and ball vale that inside and outside pressure
> is really equal.
> Open the heavy Bottom exit hatch via hydraulik cylinders.
> Dive outside
>
> Go inside, close hatch.
>
> Now we have two ways :
>
> Boat surfaced with chamber still under pressure, during the
> decompression time of the
> divers the internal pressure of the chamber will be lowered according to
> the diver
> decompression tabels to the outside atmosphere. This way is normally
> only useful with air.
> Heliox is to expensive to blow it just in the sky..
>
> so the second way:
>
> Boat surfaced or stay on the bottom - gas from the chamber goes to
> bigger emtpty pressure
> bottle storage group and expanded to 1 atm. From there via a second pipe
> to the compressor
> which compress the heliox back in the high pressure storage groups.
> This need a longe run time of the compressor - so normally the boats
> first surfaced - than
> the diesel starts to reload the batteries - than the compressor starts
> to reload the
> storage bottles.
>
> remarks:
> This chamber works only with a bottom hatch which can hold pressure from
> both sides.
>
> If the boat is low of pressure in the pressure tanks to blow the dive
> tank and still on the
> bottom - the chamber (air) gas can be released  slowly to the inside of
> the sub - from there
> via the compressor to the storage bottles and from there to the
> softtanks.
>
> Another way with the chamber under air pressure will be surfacing only
> dynamic with the rudders
> and than blow the chamber gas on the surface time by time to the
> softtanks to surface completly - to safe compressor run time.
>
> There are still some other option what we can do - but in general thats
> is.
> The chamber will be dry all the time. The sub will be in swimming
> condition all the time.
>
> regards Carsten
>
>
>
>
>
>
>
> Jeremy Crawford schrieb:
> >
> > I guess I know they don't usually flood I guess I was thinking with my 8
> > year old brain(early sub loving)  thinking it was flooding (from movies)
> > thanks Vance,  So Carsten how will your diver lockout work?  will you be
> > able to go from the DLO to the 1 ATM hull at depth?
> >
> > Thanks,
> > Jeremy
> >
> > ----- Original Message -----
> > From: <VBra676539@aol.com>
> > To: <personal_submersibles@psubs.org>
> > Sent: Tuesday, May 20, 2003 4:15 AM
> > Subject: Re: [PSUBS-MAILIST] question about Diver Lockout.
> >
> > > DLO compartment does NOT return to 1 atm at depth. Gas may be vented
> > enroute to the surface for 1st decompression stop, for instance. No DLOs
> > that I know of flood compartments (other than military). It is
enormously
> > cumbersome compared to a gas bottle. Vance
> > >
>
>