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<body link="#000000" vlink="#000000" alink="#000080" topmargin=0
leftmargin=0 marginwidth="0" marginheight="0"><font face="Courier New"
size=2>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-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT:
5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<div style="FONT-SIZE: 14pt; COLOR: #000; FONT-FAMILY: HelveticaNeue,
Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;
BACKGROUND-COLOR: #fff"
><div><span>Hi Joe,</span></div><div style="FONT-SIZE: 18px; COLOR:
rgb(0,0,0); FONT-STYLE: normal; FONT-FAMILY: HelveticaNeue, 'Helvetica
Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; BACKGROUND-COLOR:
transparent"
><span>yes the bow thrusters are a better option.</span></div><div
style="FONT-SIZE: 18px; COLOR: rgb(0,0,0); FONT-STYLE: normal;
FONT-FAMILY: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida
Grande', sans-serif; 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; COLOR:
rgb(0,0,0); FONT-STYLE: normal; FONT-FAMILY: HelveticaNeue, 'Helvetica
Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; BACKGROUND-COLOR:
transparent"
><span style="BACKGROUND-COLOR:
transparent">Alan</span></div><div><br></div> <div style="FONT-SIZE:
14pt; FONT-FAMILY: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial,
'Lucida Grande', sans-serif"> <div style="FONT-SIZE: 12pt; FONT-FAMILY:
HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande',
sans-serif"> <div dir="ltr"> <hr size="1"> <font size="2" face="Arial">
<b><span style="FONT-WEIGHT: bold">From:</span></b> Joe Perkel
<josephperkel@yahoo.com><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
8:30 AM<br> <b><span
style="FONT-WEIGHT: bold">Subject:</span></b> Re: [PSUBS-MAILIST]
Brushless Motor Drive<br> </font> </div> <div
class="y_msg_container"><br><div id="yiv2757626000"><div><div
style="FONT-SIZE: 12pt; COLOR: rgb(0,0,0); FONT-FAMILY: 'times new
roman', 'new york', times, serif; BACKGROUND-COLOR: rgb(255,255,255)"
><div ><span >Alan,</span></div>
<div style="FONT-SIZE: 16px; COLOR: rgb(0,0,0); FONT-STYLE: normal;
FONT-FAMILY: 'times new roman', 'new york', times, serif;
BACKGROUND-COLOR: transparent"
><span ></span> </div>
<div style="FONT-SIZE: 16px; COLOR: rgb(0,0,0); FONT-STYLE: normal;
FONT-FAMILY: 'times new roman', 'new york', times, serif;
BACKGROUND-COLOR: transparent"
><span >Take a look a <span class="yiv2757626000mark"
id="yiv2757626000misspell-0">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; COLOR: rgb(0,0,0); FONT-STYLE: normal;
FONT-FAMILY: 'times new roman', 'new york', times, serif;
BACKGROUND-COLOR: transparent"
><span ></span> </div>
<div style="FONT-SIZE: 16px; COLOR: rgb(0,0,0); FONT-STYLE: normal;
FONT-FAMILY: 'times new roman', 'new york', times, serif;
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; COLOR: rgb(0,0,0); FONT-STYLE: normal;
FONT-FAMILY: 'times new roman', 'new york', times, serif;
BACKGROUND-COLOR: transparent"
><span ></span> </div>
<div style="FONT-SIZE: 16px; COLOR: rgb(0,0,0); FONT-STYLE: normal;
FONT-FAMILY: 'times new roman', 'new york', times, serif;
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
class="yiv2757626000mark" id="yiv2757626000misspell-2">Popiel's</span>
<span id="yiv2757626000misspell-3"><span>Magic</span></span> Oven, just
<i>"Set it and forget it!"</i></span></div>
<div style="FONT-SIZE: 16px; COLOR: rgb(0,0,0); FONT-STYLE: normal;
FONT-FAMILY: 'times new roman', 'new york', times, serif;
BACKGROUND-COLOR: transparent"
><span ></span> </div>
<div style="FONT-SIZE: 16px; COLOR: rgb(0,0,0); FONT-STYLE: normal;
FONT-FAMILY: 'times new roman', 'new york', times, serif;
BACKGROUND-COLOR: transparent"
><span >Joe</span></div>
<div ><br clear="none" ></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 class="yiv2757626000yqt2180567864" id="yiv2757626000yqt02808"><div
dir="ltr" >
<div class="yiv2757626000hr" style="BORDER-RIGHT: #ccc 1px solid;
PADDING-RIGHT: 0px; BORDER-TOP: #ccc 1px solid; PADDING-LEFT: 0px;
FONT-SIZE: 0px; PADDING-BOTTOM: 0px; MARGIN: 5px 0px; BORDER-LEFT: #ccc
1px solid; LINE-HEIGHT: 0; PADDING-TOP: 0px; BORDER-BOTTOM: #ccc 1px
solid; HEIGHT: 0px"
></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 class="yiv2757626000mark"
id="yiv2757626000misspell-6">MAILIST</span>] <span
class="yiv2757626000mark" id="yiv2757626000misspell-7">Brushless</span>
Motor Drive<br clear="none"></font></div>
<div class="yiv2757626000y_msg_container" ><br clear="none">
<div id="yiv2757626000" >
<div >
<div style="FONT-SIZE: 14pt; COLOR: rgb(0,0,0); FONT-FAMILY:
HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande',
sans-serif; BACKGROUND-COLOR: rgb(255,255,255)"
>
<div>Hi <span class="yiv2757626000mark"
id="yiv2757626000misspell-8">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 class="yiv2757626000mark"
id="yiv2757626000misspell-9">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
class="yiv2757626000mark" id="yiv2757626000misspell-10">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
class="yiv2757626000mark" id="yiv2757626000misspell-11">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 src="cid:part0.1382781792@t-online.de"><br
clear="none"></div>
<div><br clear="none"></div></div></div></div><br
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</blockquote>
<font face="Courier New" size=2> </font><font face="Courier New"
size=2><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></body>
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