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<DIV>Hi Brian</DIV>
<DIV> </DIV>
<DIV>I just had a bow thruster put in my sailboat, per, my wife’s insistence as
she was the one who had to do the leap of faith to the dock with bow and stern
lines in hand, and it draws a lot of power so I had to put in a dedicated
battery for it but the spec’s say that it will shut off automatically after
three minutes of continues use to prevent any damage from over heating. Might
want to check into that before going that direction?</DIV>
<DIV> </DIV>
<DIV>Rick</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=brian@ojaivalleybeefarm.com
href="mailto:brian@ojaivalleybeefarm.com">brian</A> </DIV>
<DIV><B>Sent:</B> Saturday, October 26, 2013 3:54 AM</DIV>
<DIV><B>To:</B> <A title=personal_submersibles@psubs.org
href="mailto:personal_submersibles@psubs.org">Personal Submersibles General
Discussion</A> </DIV>
<DIV><B>Subject:</B> Re: [PSUBS-MAILIST] Brushless Motor Drive</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV
style="FONT-SIZE: small; FONT-FAMILY: 'Calibri'; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; TEXT-DECORATION: none; DISPLAY: inline">Hi
Carsten,<BR>
Do you need to worry about expansion of the oil when the bow thruster motor
heats up? Do you have a remedy for that? or maybe it's not a problem
because you use it only when docking.<BR><BR>Brian<BR><BR>-----Original
Message-----<BR>From: <MerlinSub@t-online.de><BR>Sent 10/26/2013 3:03:00
AM<BR>To: "Personal Submersibles General Discussion"
<personal_submersibles@psubs.org><BR>Subject: Re: [PSUBS-MAILIST]
Brushless Motor Drive<BR><BR><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><BR>Special with a oil hydraulic forward and aft shift system it is
nearly impossible. <BR>Needs allways a iddle rpm of the engine to feed the oil
pump and to shift. <BR>Means you have to run forward to shift in reverse and
opposite. <BR>Or need a clunch. <BR>Also the modern units are more complicate in
the shift and oil system than it looks like. <BR><BR><A
href="http://www.euronaut.org/content/gfx/equipment/Bowthrustermockeup01.jpg">http://www.euronaut.org/content/gfx/equipment/Bowthrustermockeup01.jpg</A><BR><A
href="http://www.euronaut.org/content/gfx/equipment/IMG_5913a.jpg">http://www.euronaut.org/content/gfx/equipment/IMG_5913a.jpg</A><BR><BR>We
scrapp both prototypes and purchase normal electric bowthruster and oil
compensate them. <BR>Was much easier. <BR><BR>vbr Carsten <BR><BR>"Alan James"
<alanlindsayjames@yahoo.com> schrieb:
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; PADDING-RIGHT: 0px; MARGIN-RIGHT: 0px">
<DIV style="FONT-SIZE: 14pt; FONT-FAMILY: helveticaneue,
helvetica neue, helvetica, arial, lucida grande, sans-serif; COLOR: #000; BACKGROUND-COLOR: #fff">
<DIV><SPAN>Hi Joe,</SPAN></DIV>
<DIV style="FONT-SIZE: 18px; FONT-FAMILY: helveticaneue, 'Helvetica
neue', Helvetica, Arial, 'lucida grande', sans-serif; COLOR: #000000; FONT-STYLE: normal; BACKGROUND-COLOR: transparent"><SPAN>yes
the bow thrusters are a better option.</SPAN></DIV>
<DIV
style="FONT-SIZE: 18px; FONT-FAMILY: helveticaneue, 'Helvetica Neue', helvetica, arial, 'Lucida
grande', sans-serif; COLOR: #000000; FONT-STYLE: normal; BACKGROUND-COLOR: transparent"><SPAN>I
thought that because of the mass production of outboards, that a lower unit
may be </SPAN><SPAN style="BACKGROUND-COLOR: transparent">reasonably cheap
& adaptable. After further Googling I found they were reasonably expensive
& there could be issues with the gear case oil getting
contaminated.</SPAN></DIV>
<DIV style="FONT-SIZE: 18px; FONT-FAMILY: helveticaneue, 'Helvetica
neue', Helvetica, Arial, 'lucida grande', sans-serif; COLOR: #000000; FONT-STYLE: normal; BACKGROUND-COLOR: transparent"><SPAN
style="BACKGROUND-COLOR: transparent">Alan</SPAN></DIV>
<DIV> </DIV>
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<FONT size=2 face=Arial><STRONG><SPAN
style="FONT-WEIGHT: bold">From:</SPAN></STRONG> Joe Perkel
<josephperkel@yahoo.com><BR><STRONG><SPAN
style="FONT-WEIGHT: bold">To:</SPAN></STRONG> Personal Submersibles General
Discussion <personal_submersibles@psubs.org> <BR><STRONG><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></STRONG> Saturday, October 26, 2013
8:30 AM<BR><STRONG><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></STRONG>
Re: [PSUBS-MAILIST] Brushless Motor Drive<BR></FONT></DIV>
<DIV class=y_msg_container>
<DIV> </DIV>
<DIV id=yiv2757626000>
<DIV>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'times new
roman', 'new york', times, serif; COLOR: #000000; BACKGROUND-COLOR: #ffffff">
<DIV><SPAN>Alan,</SPAN></DIV>
<DIV
style="FONT-SIZE: 16px; FONT-FAMILY: 'times new roman', 'new york', times, serif; COLOR: #000000; FONT-STYLE: normal; BACKGROUND-COLOR: transparent"> </DIV>
<DIV
style="FONT-SIZE: 16px; FONT-FAMILY: 'times new roman', 'new york', times, serif; COLOR: #000000; FONT-STYLE: normal; BACKGROUND-COLOR: transparent"><SPAN>Take
a look a <SPAN id=yiv2757626000misspell-0
class=yiv2757626000mark>Lewmar</SPAN> thrusters, they have a 90 deg transfer
case and housing that is purpose built, <SPAN
id=yiv2757626000misspell-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>
<DIV
style="FONT-SIZE: 16px; FONT-FAMILY: 'times new roman', 'new york', times, serif; COLOR: #000000; FONT-STYLE: normal; BACKGROUND-COLOR: transparent"> </DIV>
<DIV
style="FONT-SIZE: 16px; FONT-FAMILY: 'times new roman', 'new york', times, serif; COLOR: #000000; FONT-STYLE: normal; BACKGROUND-COLOR: transparent"><SPAN>The
advantage here would be two fold, m<VAR
id=yiv2757626000yui-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>
<DIV
style="FONT-SIZE: 16px; FONT-FAMILY: 'times new roman', 'new york', times, serif; COLOR: #000000; FONT-STYLE: normal; BACKGROUND-COLOR: transparent"> </DIV>
<DIV
style="FONT-SIZE: 16px; FONT-FAMILY: 'times new roman', 'new york', times, serif; COLOR: #000000; FONT-STYLE: normal; BACKGROUND-COLOR: transparent"><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=yiv2757626000misspell-2 class=yiv2757626000mark>Popiel's</SPAN> <SPAN
id=yiv2757626000misspell-3><SPAN>Magic</SPAN></SPAN> Oven, just <EM>"Set it
and forget it!"</EM></SPAN></DIV>
<DIV
style="FONT-SIZE: 16px; FONT-FAMILY: 'times new roman', 'new york', times, serif; COLOR: #000000; FONT-STYLE: normal; BACKGROUND-COLOR: transparent"> </DIV>
<DIV
style="FONT-SIZE: 16px; FONT-FAMILY: 'times new roman', 'new york', times, serif; COLOR: #000000; FONT-STYLE: normal; BACKGROUND-COLOR: transparent"><SPAN>Joe</SPAN></DIV>
<DIV> </DIV>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'times new roman', 'new york',
times, serif">
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'times new roman', 'new york',
times, serif">
<DIV id=yiv2757626000yqt02808 class=yiv2757626000yqt2180567864>
<DIV dir=ltr>
<DIV class=yiv2757626000hr
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"></DIV><FONT
size=2 face=Arial><STRONG><SPAN
style="FONT-WEIGHT: bold">From:</SPAN></STRONG> Alan James
<alanlindsayjames@yahoo.com><BR clear=none><STRONG><SPAN
style="FONT-WEIGHT: bold">To:</SPAN></STRONG> psubs.org
<personal_submersibles@psubs.org> <BR clear=none><STRONG><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></STRONG> Friday, October 25, 2013 5:57
AM<BR clear=none><STRONG><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></STRONG> [PSUBS-<SPAN
id=yiv2757626000misspell-6 class=yiv2757626000mark>MAILIST</SPAN>] <SPAN
id=yiv2757626000misspell-7 class=yiv2757626000mark>Brushless</SPAN> Motor
Drive<BR clear=none></FONT></DIV>
<DIV class=yiv2757626000y_msg_container>
<DIV> </DIV>
<DIV id=yiv2757626000>
<DIV>
<DIV
style="FONT-SIZE: 14pt; FONT-FAMILY: helveticaneue, 'Helvetica Neue', helvetica, arial, 'Lucida Grande',
sans-serif; COLOR: #000000; BACKGROUND-COLOR: #ffffff">
<DIV>Hi <SPAN id=yiv2757626000misspell-8
class=yiv2757626000mark>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=yiv2757626000misspell-9
class=yiv2757626000mark>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=yiv2757626000misspell-10 class=yiv2757626000mark>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=yiv2757626000misspell-11 class=yiv2757626000mark>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>
<DIV><IMG alt=""
src="./temp/part0.1382781792@t-online.de@medium[1].jpeg_medium[1].jpeg"><BR
clear=none></DIV>
<DIV> </DIV></DIV></DIV></DIV><BR
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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> <PRE>_______________________________________________
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