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Re: [PSUBS-MAILIST] Regulators, barometers and oxygen
Carsten,
How come you & Phil are talking about altimeters.
They only measure pressure below 1 atm.
Wouldn't it be better to have a barometer that indicated over pressure as well?
Also when is the Euronaut going in the water?, must be nearly finished.
Alan
----- Original Message -----
From: <MerlinSub@t-online.de>
To: <personal_submersibles@psubs.org>
Sent: Friday, December 31, 2010 11:32 PM
Subject: [PSUBS-MAILIST] Regulators, barometers and oxygen
Scuba diving without minimum three feet of ice over the head? Why?
-Last scuba dive 2 years ago..- :-(
I just count the regulatos in Euronaut:
01) Main Oxygen regulator in control room (CR) HP to LP, with gauge
02) Oxygen flow needle vale in CR, LP to ambient, with flow gauge
03) Oxygen flow needle vale in diver chamber (DR), LP to ambient, with flow gauge
04) Main Pressure reducer from HP to LP for the hard tanks in CR
This one is a big industrial one. With gauge.
05) 1 Emergency scuba two stage regulators with Octopus on the HP Valve board in Machinery Room
06) 4 Emergency scuba regulator second stage (octopus) on the ceiling of the saloon.
07) 1 Scuba regulator first stage behind the saloon walls to feed 06) with gauge
08) 1 Emergenny scuba regulator both stages with octopus in the diver chamber from the HP line
If the Euronaut will retiered in 30 years or so I can feed a scuba diver museum with a douzend different regulators alone. All
regulators are inside and with exeption of 04) with quick connectors for maintance.
The sub has 40 m3 inside volume. The O2 bottle in use is inside has just 2 m3 or 5% of the internal volume.
The bottle in use reach about 83 hour for one or 21 hours for four persons. Very fine for a weekend.
If the main valve of this bottle fails and all oxygen goes into the hull it will incrase the oxygen level from 21 to max 26%.
There is a second bottle as spare but not conneted inside. And there are four more o2 bottles with a total volume of 44 m3
outside - reach for 4 guys about one months..
The "barometer" is an altimeter from a old russian MIG 15. Goes up to 10.000 meter (33.000 feet)(The russians use also metric -
very nice) During underpressure test with closed hatches and running diesel we reach 5.000 meter (16.500 feet)in 5 Minutes before
illness of all three peersons started. For a smaller sub I would use a smaller skydiver altimeter as Phil allready indicate.
Original I was looking for a altimeter from a Ju 87 Stuka. This unit comes with a adjustable second nice red indicator with close
at the right high a electic contact to drop the bomb. In our case to stopp the diesel. But I was to late on the auction.
http://cgi.ebay.at/Orig-Kontakt-Hoehenmesser-Ju-87-Stuka-Fl-22317-1943-/250728825890
:-) Carsten
"Hugh Fulton" <hc.fulton@gmail.com> schrieb:
Emile,
I cannot understand how a clever person will Scuba dive in 1 degree. I
think you are crazy. J
You will never find me in under 10 degrees. However it is nice to know that
the equipment works in those temperatures.
Happy new year,
Hugh
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Emile van Essen
Sent: Friday, 31 December 2010 10:55 a.m.
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Regulators
Hugh,
The number 1 or 4 is the number of low pressure ports. 1 LP port is needed.
We monitor the content of the bottle with a gauge outside . To be viewed
trough the the dome. This saves throughhulls and plumbing.
Cheers, Emile
Ps. The Apeks is also good in cold water; I dived yesterday SCUBA in water
of 1 Deg. Celcius. : no freezing problems but sub dives are warmer?..
_____
Van: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] Namens Hugh Fulton
Verzonden: donderdag 30 december 2010 22:34
Aan: personal_submersibles@psubs.org
Onderwerp: RE: [PSUBS-MAILIST] Regulators
Thanks Emile and Sean,
I have never come across Apeks but just googled it and now better informed.
I will go with Apeks 1st stage. What is the difference between DS1 and
DS4?
I like the idea of all regs outside with secondary regs inside, if required,
for oxygen where constant pressure for constant flow is required. I am
looking for a small panel mount second stage now.
The only problem with regs outside is you need another 2 ports for contents
monitoring. I am a bit short of through hull?s. I have 12 x ¼?npt and 10 x
½? npt and 2 x 1? npt. I thought that would have been heaps.
I have finally had my hull tested at 515 ft with windows in and now fitting
the hull to the fibreglass fairing. Getting closer. Chs, Hugh
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Sean T.
Stevenson
Sent: Friday, 31 December 2010 9:30 a.m.
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Regulat
I just want to second the endorsement of Apeks SCUBA regulators. I have
used many different makes and models over the years, and the Apeks are the
only ones I never regretted purchasing. I have several DS4's and a couple
of the newer ones, and will no longer buy anything else.
-Sean
On 30/12/2010 12:15 PM, Emile van Essen wrote:
Hugh,
You mean the dive tank regulators right ?
They reduce the pressure to about 10 Bar over ambient. If you have them
inside, You cannot blow tanks when you are deeper than 100 Metres (=10 Bar)
So better store tanks an regulators outside on a 1ATM sub.
For oxygen no difference but store outside saves room inside?
I Like the Apeks DS1 or DS4 but any rugged and common regulator will do the
job.
Emile
_____
Van: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] Namens Hugh Fulton
Verzonden: donderdag 30 december 2010 20:53
Aan: personal_submersibles@psubs.org
Onderwerp: [PSUBS-MAILIST] Regulators
Placement of regulators and choice of them.
For Air and oxygen. Is it best to have the regulators inside or outside the
pressure hull? I noticed that some have the regs outside and others inside.
What brand/models have people found the best? Hugh
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