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<body link="#000000" vlink="#000000" alink="#000080" topmargin=0
leftmargin=0 marginwidth="0" marginheight="0">Hi
Marc,<BR> <BR>before I response in detail, which size should the
sub have?
And which range?<BR><BR>And which kind of wave high, wave length and
weather you
want to survife on the surface?<BR>Any concept sketch? Do you like to
snorckel
with the sub? <BR><BR>Euronaut has more problems with the short medium
high wave
in the baltic <BR>than with the high but long waves in the north
sea.<BR> <BR>Bad weather in the north sea lift the hole boat before
the
wave reach the sail, but in the Baltic the waves are <BR>shorter and did
mot
lift the boat so much - as result the sail goes very wet. Like in the
movie "Das
Boot"<BR><BR>Short wave in the baltic: <BR><A
href="http://www.euronaut.org/content/gfx/operational/IMG_8705.jpg">http://www.euronaut.org/content/gfx/operational/IMG_8705.jpg</A><BR><BR>Here
the over waterline exhaust of Euronaut in operation. <BR>The funny sound
comes
from a wave flap close to the end of the exhaust <BR>which goes up and
down at
idlle speed. <BR><A
href="http://www.youtube.com/watch?v=PT7i05s92ak">http://www.youtube.com/watch?v=PT7i05s92ak</A><BR><BR>Cooling
is also something you should have in mind. <BR><BR>And noise..
<BR><BR>And..<BR><BR>vbr Carsten<BR><BR>
<BR>
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0px" class=hr contentEditable=false readonly="true"></DIV><FONT size=2
face=Arial><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Marc
<SPAN id=misspell-4 class=mark>de</SPAN> <SPAN id=misspell-5
class=mark>Piolenc</SPAN> <piolenc@archivale.com><BR><B><SPAN
style="FONT-WEIGHT: bold">To:</SPAN></B> personal_submersibles@psubs.org
<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Thursday,
October 10, 2013 10:15 PM<BR><B><SPAN style="FONT-WEIGHT:
bold">Subject:</SPAN></B> Re: [PSUBS-<SPAN id=misspell-7
class=mark>MAILIST</SPAN>] Dive report - Pickles Reef<BR></FONT></DIV>
<DIV style="RIGHT: auto" class=y_msg_container><BR>I&<SPAN
id=misspell-8 class=mark>apos</SPAN>;<SPAN id=misspell-9
class=mark>ve</SPAN> been following this discussion with great interest.
I don&<SPAN id=misspell-10 class=mark>apos</SPAN>;t have a <BR
clear=none>sub yet, but I do live in the Tropics, and as there&<SPAN
id=misspell-11 class=mark>apos</SPAN>;s no cold current <BR
clear=none>handy to where I live any subbing I do will be in water
pretty near air <BR clear=none>temperature. As you might expect,
I&<SPAN id=misspell-12 class=mark>apos</SPAN>;<SPAN id=misspell-13
class=mark>ve</SPAN> given this problem a lot of thought.<BR
clear=none><BR clear=none>My tentative conclusion is that, if I build a
sub, I will have to make <BR clear=none>it more autonomous than is the
rule on this list. Specifically, it will <BR clear=none>need a
combustion engine to ferry itself on the surface to dive sites, <BR
clear=none>and to maintain comfort
and keep the battery topped off for diving while <BR clear=none>doing
so. I started with the assumption that I would need an air <BR
clear=none>conditioning unit running off a small industrial diesel, but
then I <BR clear=none>realized that, if I use a snorkel exhausting into
the cabin, and have <BR clear=none>the diesel draw air from the cabin, I
get continuous renewal of the air <BR clear=none>in the cabin without
the cost, power burden and safety problems of <BR clear=none>running a
Rankine cycle refrigeration system. That&<SPAN id=misspell-14
class=mark>apos</SPAN>;s the solution that <BR clear=none>I&<SPAN
id=misspell-15 class=mark>apos</SPAN>;<SPAN id=misspell-16
class=mark>ve</SPAN> retained for the moment. Of course I also need a
secure means of <BR clear=none>preventing exhaust gas from being
aspirated into the snorkel (I can&<SPAN id=misspell-17
class=mark>apos</SPAN>;t <BR clear=none>quite understand how naval
submarines manage to
combine both functions <BR clear=none>in one mast), but that might be
as simple as having the diesel exhaust <BR clear=none>flush with the
hull, with some arrangement to prevent water from coming <BR
clear=none>in. Since the diesel would only be used on the surface, and
the snort <BR clear=none>would only be there to allow a low-<SPAN
id=misspell-18 class=mark>freeboard</SPAN> hatch to be kept closed, <BR
clear=none>the power penalty would be minimal.<BR clear=none><BR
clear=none>Fuel storage, fuel feed and the like still have to be worked
out. Naval <BR clear=none>submarines have very complex arrangements for
this, and that complexity <BR clear=none>must be tolerated for a good
reason. Even so, I need a simpler way to do <BR clear=none>it that still
protects the fuel from contamination and me from asphyxiation.<BR
clear=none><BR clear=none>Marc <SPAN id=misspell-19 class=mark>de</SPAN>
<SPAN id=misspell-20 class=mark>Piolenc</SPAN><BR
clear=none></DIV></DIV></DIV></div>
</blockquote><font face="Courier New" size=2>-- <br><BR>Carsten
Standfuß<BR>Dipl.Ing.Schiffbau @ Meerestechnik<BR>Heinrich Reck
Str.12A<BR>18211 Admannshagen<BR><BR>0172 8464
420<BR>WWW.Euronaut.org<BR>Carsten@euronaut.org</font></body>
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