<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div style="RIGHT: auto"><SPAN style="RIGHT: auto">Thank you Carsten!, It is very helpful to see what has been done by others <SPAN style="RIGHT: auto" id=misspell-1><SPAN>successfully</SPAN></SPAN> or not so.</SPAN></div>
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<div style="RIGHT: auto"><SPAN style="RIGHT: auto">Joe</SPAN></div>
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<DIV style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" class=hr contentEditable=false readonly="true"></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 26, 2013 6:03 AM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [PSUBS-MAILIST] Brushless Motor Drive<BR></FONT></DIV>
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<DIV><FONT size=2 face="Courier New">I did this in the past. Looks cool and second hand lower units are relative unexpensive if you purchase ouboards with damage heads - but do not work well. </FONT> <BR clear=none><BR clear=none>Special with a oil hydraulic forward and aft shift system it is nearly impossible. <BR clear=none>Needs allways a iddle rpm of the engine to feed the oil pump and to shift. <BR clear=none>Means you have to run forward to shift in reverse and opposite. <BR clear=none>Or need a clunch. <BR clear=none>Also the modern units are more complicate in the shift and oil system than it looks like. <BR clear=none><BR clear=none><A href="http://www.euronaut.org/content/gfx/equipment/Bowthrustermockeup01.jpg" shape=rect rel=nofollow target=_blank>http://www.euronaut.org/content/gfx/equipment/Bowthrustermockeup01.jpg</A><BR clear=none><A href="http://www.euronaut.org/content/gfx/equipment/IMG_5913a.jpg" shape=rect
rel=nofollow target=_blank>http://www.euronaut.org/content/gfx/equipment/IMG_5913a.jpg</A><BR clear=none><BR clear=none>We scrapp both prototypes and purchase normal electric bowthruster and oil compensate them. <BR clear=none>Was much easier. <BR clear=none><BR clear=none>vbr Carsten <BR clear=none><BR clear=none>"Alan James" <alanlindsayjames@yahoo.com> schrieb:
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<DIV><SPAN>Hi Joe,</SPAN></DIV>
<DIV style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; COLOR: rgb(0,0,0); FONT-SIZE: 18px"><SPAN>yes the bow thrusters are a better option.</SPAN></DIV>
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<DIV style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" class=hr contentEditable=false readonly="true"></DIV><FONT size=2 face=Arial><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Joe Perkel <josephperkel@yahoo.com><BR clear=none><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <BR clear=none><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Saturday, October 26, 2013 8:30 AM<BR clear=none><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [PSUBS-MAILIST] Brushless Motor Drive<BR clear=none></FONT></DIV>
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<DIV><SPAN>Alan,</SPAN></DIV>
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<DIV style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: 'times new roman', 'new york', times, serif; COLOR: rgb(0,0,0); FONT-SIZE: 16px"><SPAN>Take a look a <SPAN id=yiv8576373263misspell-0 class=yiv8576373263mark>Lewmar</SPAN> thrusters, they have a 90 deg transfer case and housing that is purpose built, <SPAN id=yiv8576373263misspell-1><SPAN>hydro-dynamically</SPAN></SPAN> clean, and better adaptable that an OB lower unit, (that looks a bit cumbersome). I've not yet ruled out purchasing one in a boating flea market to get a closer look.</SPAN></DIV>
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<DIV style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: 'times new roman', 'new york', times, serif; COLOR: rgb(0,0,0); FONT-SIZE: 16px"><SPAN>The advantage here would be two fold, m<VAR id=yiv8576373263yui-ie-cursor></VAR>atching already known specs exactly including the use of the props, tip clearance,.. etc, and secondly, removing as you say the motor housing from the flow path.</SPAN></DIV>
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<DIV style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: 'times new roman', 'new york', times, serif; COLOR: rgb(0,0,0); FONT-SIZE: 16px"><SPAN>If I were to compensate, Id use the flex tubing method. But, I like pressure resistant housings for these "sport" depths. Like <SPAN id=yiv8576373263misspell-2 class=yiv8576373263mark>Popiel's</SPAN> <SPAN id=yiv8576373263misspell-3><SPAN>Magic</SPAN></SPAN> Oven, just <I>"Set it and forget it!"</I></SPAN></DIV>
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<DIV style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: 'times new roman', 'new york', times, serif; COLOR: rgb(0,0,0); FONT-SIZE: 16px"><SPAN>Joe</SPAN></DIV>
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<DIV style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" class=yiv8576373263hr></DIV><FONT size=2 face=Arial><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Alan James <alanlindsayjames@yahoo.com><BR clear=none><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> psubs.org <personal_submersibles@psubs.org> <BR clear=none><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Friday, October 25, 2013 5:57 AM<BR clear=none><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [PSUBS-<SPAN id=yiv8576373263misspell-6 class=yiv8576373263mark>MAILIST</SPAN>] <SPAN id=yiv8576373263misspell-7 class=yiv8576373263mark>Brushless</SPAN> Motor Drive<BR clear=none></FONT></DIV>
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<DIV>Hi <SPAN id=yiv8576373263misspell-8 class=yiv8576373263mark>Psubbers</SPAN></DIV>
<DIV>I've been thinking about motor compensation options.</DIV>
<DIV>Any thoughts about whether this idea may have any merits?.....</DIV>
<DIV>Mount a <SPAN id=yiv8576373263misspell-9 class=yiv8576373263mark>brushless</SPAN> motor vertically on an outboard motor lower unit gear case</DIV>
<DIV>& air compensate it.</DIV>
<DIV>The length of the vertical drive shaft from the motor to the gear case gives</DIV>
<DIV>plenty of margin of error for the air compensation system before any water</DIV>
<DIV>could make its way to the motor.</DIV>
<DIV>The gearing already exists for the higher speed of the <SPAN id=yiv8576373263misspell-10 class=yiv8576373263mark>brushless</SPAN> motor, & although</DIV>
<DIV>there is an energy loss through the gearing there would be some savings in </DIV>
<DIV>that the motor is not directly in the path of the <SPAN id=yiv8576373263misspell-11 class=yiv8576373263mark>propellor</SPAN> thrust.</DIV>
<DIV>A can would need to be made around the motor & sealed on to the lower unit.</DIV>
<DIV>Regards Alan</DIV>
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<DIV><BR clear=none></DIV></DIV></DIV></DIV><BR clear=none>_______________________________________________<BR clear=none>Personal_Submersibles mailing list<BR clear=none><A href="mailto:Personal_Submersibles@psubs.org" shape=rect rel=nofollow target=_blank ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</A><BR clear=none><A href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" shape=rect rel=nofollow target=_blank>http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</A><BR clear=none><BR clear=none><BR clear=none></DIV></DIV></DIV></DIV></DIV></DIV></DIV><BR clear=none>
<DIV id=yiv8576373263yqt67490 class=yiv8576373263yqt2180567864>_______________________________________________<BR clear=none>Personal_Submersibles mailing list<BR clear=none><A href="mailto:Personal_Submersibles@psubs.org" shape=rect rel=nofollow target=_blank ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</A><BR clear=none><A href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" shape=rect rel=nofollow target=_blank>http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</A><BR clear=none></DIV><BR clear=none><BR clear=none></DIV></DIV></DIV></DIV></BLOCKQUOTE></DIV><FONT size=2 face="Courier New"> </FONT><FONT size=2 face="Courier New"><BR clear=none><BR clear=none>-- <BR clear=none><BR clear=none>Carsten Standfuß<BR clear=none>Dipl.Ing.Schiffbau @ Meerestechnik<BR clear=none>Heinrich Reck Str.12A<BR clear=none>18211 Admannshagen<BR clear=none><BR clear=none>0172 8464 420<BR
clear=none>WWW.Euronaut.org<BR clear=none>Carsten@euronaut.org</FONT></DIV></DIV><BR>
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