<html><body><div style="color:#000; background-color:#fff; font-family:tahoma, new york, times, serif;font-size:12pt"><div style="RIGHT: auto"><SPAN style="RIGHT: auto">I have been toying with the idea of a small air cooled engine that I can remove from an air tight compartment inside the sub. I would place it on the deck outside the sub and it could charge batteries on the fly. Not good in rough water, but it could extend the range of the sub. I think a 6hp motor could drive a 24v 70a alternator and it would fit through the hatch easily. I used to charge the batteries <VAR id=yui-ie-cursor></VAR>in my orange sub that way because the sub was moored full time.</SPAN></div>
<div style="RIGHT: auto"><SPAN style="RIGHT: auto">Hank</SPAN></div>
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<DIV class=hr style="FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; HEIGHT: 0px; BORDER-RIGHT: #ccc 1px solid; BORDER-BOTTOM: #ccc 1px solid; PADDING-BOTTOM: 0px; PADDING-TOP: 0px; PADDING-LEFT: 0px; MARGIN: 5px 0px; BORDER-LEFT: #ccc 1px solid; LINE-HEIGHT: 0; PADDING-RIGHT: 0px" readonly="true" contenteditable="false"></DIV><FONT size=2 face=Arial><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> "MerlinSub@t-online.de" <MerlinSub@t-online.de><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Saturday, October 12, 2013 10:35:00 AM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [PSUBS-MAILIST] Diesel Psubs<BR></FONT></DIV>
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<DIV><FONT size=2 face="Courier New">Marc exact that..<BR><BR>- Close the door of the engine compartment helps.<BR><BR>- stay a time on the surface before diving helps also -but not so much. <BR></FONT> On a close enviroment like a submarine the machinery is still hand warm on the next day..<BR><BR>- The pressure tight cooling system is exact what I did. But for other reasons.<BR><BR> A normal boats diesel cooling has a internal freshwater cecurit with a pump on the engine for the freshwater. <BR> than a heat exchanger between the interank freshwater and the external seawater and a seawater pump for the external seawater cecurit. <BR><BR> For saftey reason I go for a single loop. Means only the freshwater sytem but running to the outside pipes and pressure tight. Caleld "keel cooling system" here. Many fishing vessel here have aht simple system. Only one pump, no heat exchanger and no vales to
close before diving on the cooling system. Of course there are two valves - but just for emergency closing if the outside pipe system is damage - very unusual by angle bar pipes made of one inch strong steel. <BR><BR> In general the system can be use to cool the engine block down. But my freswater pump is direct driven by the diesel via a belt and will not operate underwater. And I think it is wrong to cool the diesel down that way - maybe you need his force short after surfacing. <BR><BR>On a psub size sub it makes sence to run the diesel just as electric powergenerator in his own sound box. <BR>Purchase of the shelf ready with all auxillariy systems. On a bigger sub like Euronaut it may mmakes more sences for a direct diesel driven propeller gear with a auxillery generator to load the batteries and drive the baot underwater. <BR><BR>vbr Carsten<BR><BR>"Marc de Piolenc" <<A href="mailto:piolenc@archivale.com" rel=nofollow
target=_blank ymailto="mailto:piolenc@archivale.com">piolenc@archivale.com</A>> schrieb:<BR>> My thinking exactly in planning air intake into the cabin, drawn by and <BR>> into the engine.<BR>> <BR>> Good point about residual heat when diving. My only "solution" to this <BR>> would be to provide a thermosiphon loop that would continue cooling the <BR>> engine's heat exchanger while diving, but that would of course mean that <BR>> the whole heat exchanger system would have to be built to withstand full <BR>> dive depth. Not very satisfactory. I suppose one could either close off <BR>> the engine compartment while diving or just spend some time on the <BR>> surface prior to diving to allow the heat to dissipate.<BR>> <BR>> Marc<BR>> <BR>> On 10/12/2013 1:56 AM, <A href="mailto:MerlinSub@t-online.de" rel=nofollow target=_blank ymailto="mailto:MerlinSub@t-online.de">MerlinSub@t-online.de</A> wrote:<BR>> >
Breathing air for the diesel engine from inside the cabin is very common<BR>> > to clean the cabin air. Air goes in the cabin via the open hatch.<BR>> ><BR>> > It also remove the little leaks from the exhaust and the oil dust. And<BR>> > works very well on the surface.<BR>> > In Euronaut the diesel air inlet is from the battery bilge compartment<BR>> > to vent also the battery gases during charing them on the surface run.<BR>> -- <BR>> Archivale catalog: <A href="http://www.archivale.com/catalog" rel=nofollow target=_blank>http://www.archivale.com/catalog</A><BR>> Polymath weblog: <A href="http://www.archivale.com/weblog" rel=nofollow target=_blank>http://www.archivale.com/weblog</A><BR>> Translations (ProZ profile): <A href="http://www.proz.com/profile/639380" rel=nofollow target=_blank>http://www.proz.com/profile/639380</A><BR>> Translations (BeWords profile): <A
href="http://www.bewords.com/Marc-dePiolenc" rel=nofollow target=_blank>http://www.bewords.com/Marc-dePiolenc</A><BR>> Ducted fans: <A href="http://massflow.archivale.com/" rel=nofollow target=_blank>http://massflow.archivale.com/</A><BR>> _______________________________________________<BR>> Personal_Submersibles mailing list<BR>> <A href="mailto:Personal_Submersibles@psubs.org" rel=nofollow target=_blank ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</A><BR>> <A href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" rel=nofollow target=_blank>http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</A><BR>> <BR><FONT size=2 face="Courier New"> </FONT><FONT size=2 face="Courier
New"><BR><BR>-- <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></DIV></DIV><BR>_______________________________________________<BR>Personal_Submersibles mailing list<BR><A href="mailto:Personal_Submersibles@psubs.org" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</A><BR><A href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target=_blank>http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</A><BR><BR><BR></DIV></DIV></DIV></div></body></html>