Re: [PSUBS-MAILIST] Cylinder choice.

["Pierre Poulin" <pipo305@hotmail.com>]

Thanks guys.

Dan or Cartens or anybody else,

If you can breath 1 hour with the air in the sub, how long can you extend 
that 1 hour with a scrubber system?

Also, in my ambient sub. If I have 1 hour air at 1atm, will I have 2 hour at 
2atm? 3 at 3atm, etc... since there is 2, 3 time the amount of o2 in the 
ambient air. Will I exhale 2, 3 time more co2?

Maybe this is a good question for Herve?

By the way, I found a perfect place to first try my sub. It's a tank that is 
10 X 10 X 10 foot. The top is at floor level. I have acces to a fork lift to 
raise the sub if need be, I can adjust the water level in the tank and the 
water is at 30 deg C!!! Just want to share my happiness with you guys...

Thanks again!

Pierre Poulin




>From: "Dan H." <JMachine@adelphia.net>
>Reply-To: personal_submersibles@psubs.org
>To: <personal_submersibles@psubs.org>
>Subject: Re: [PSUBS-MAILIST] Cylinder choice.
>Date: Sun, 23 Mar 2003 11:02:20 -0500
>
>Piere,
>
>You can't beat Carstans explanation.  He's far more experienced then I am.
>I've done some research but am still in the building phase.  I'm about 2/3
>done with my K-350.
>
>It does however have a snorkel like Carstan mentioned on the conning tower
>for the purpose of breathing outside air as long as possible while sealed 
>in
>the sub.  The snorkel has a float valve on the outside and a ball valve on
>the inside to lock it off while submerged.
>
>I will carry supplemental O2 and a CO2 scrubber.  I may not carry a full 72
>hours supply though.  Most of my diving, if not all, will be in easy to
>reach places and not to any great depths.  If that changes I will add more.
>
>In a K-350 I am told that a planned surface and venting every hour is
>advisable.  The upper limit of a person surviving is around five hours "AT
>REST."  But who will actually be at REST if entangled on the bottom?
>
>My sub also has a 2 inch flood valve to equalize pressure and allow escape
>with a bail out bottle if the depth permits as a last effort.
>
>Dan H.
>
>----- Original Message -----
>From: "Pierre Poulin" <pipo305@hotmail.com>
>To: <personal_submersibles@psubs.org>
>Sent: Saturday, March 22, 2003 9:41 PM
>Subject: Re: [PSUBS-MAILIST] Cylinder choice.
>
>
> > Hi Dan!
> >
> > You only breath the air that is inside the hull? With only a scrubber
> > system? I presume your sub is a 1atm type. What is the time you can be
>under
> > water?
> >
> > What about the 72 hours autonomy emergency reserve?
> >
> > I always presumed that in 1atm sub there was a constant flow of fresh 
>air
> > comming in and a pump to blow out the excess pressure.
> >
> > My sub is a dry ambient. Can I breath only the air inside the hull once 
>it
> > is equalized?
> >
> > Thank you very much. I know those questions are very basic but I
> > misunderstood them from the beginning.
> >
> > Pierre Poulin
> >
> >
> >
> >
> > >From: "Dan H." <JMachine@adelphia.net>
> > >Reply-To: personal_submersibles@psubs.org
> > >To: <personal_submersibles@psubs.org>
> > >Subject: Re: [PSUBS-MAILIST] Cylinder choice.
> > >Date: Sat, 22 Mar 2003 19:50:54 -0500
> > >
> > >None for breathing air.  If you bread out of a cylinder you have to
>exhale
> > >within the hull, raising the internal pressure.  A small tank for
>emergency
> > >exit is a good idea though.  While dived, breath the air contained 
>within
> > >the sub hull itself.
> > >
> > >I have two SCUBA tanks for blowing ballast.  One to use and one for
> > >reserve.
> > >
> > >Dan H.
> > >
> > >----- Original Message -----
> > >From: "Pierre Poulin" <pipo305@hotmail.com>
> > >To: <personal_submersibles@psubs.org>
> > >Sent: Saturday, March 22, 2003 9:49 AM
> > >Subject: [PSUBS-MAILIST] Cylinder choice.
> > >
> > >
> > > >
> > > > Hi gang!
> > > >
> > > > I would like to konw what kind of cylinders you are using for 
>breating
> > >air.
> > > >
> > > > Thanks.
> > > >
> > > > Pierre Poulin
> > > > "the ice is melting now!"
> > > >
> > > >
> > > >
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>


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