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 />
<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1" />
<title>E-Mail Software 6.0</title>
<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:
#000000; 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: #000000; 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:
#000000; 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 face="Arial" size="2">
<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"><br />
<div id="yiv2757626000">
<div>
<div style="font-size: 12pt; color: #000000; font-family: 'times new
roman', 'new york', times, serif; background-color: #ffffff">
<div><span>Alan,</span></div>
<div style="font-size: 16px; color: #000000; font-style: normal;
font-family: 'times new roman', 'new york', times, serif;
background-color: transparent"> </div>
<div style="font-size: 16px; color: #000000; 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: #000000; font-style: normal;
font-family: 'times new roman', 'new york', times, serif;
background-color: transparent"> </div>
<div style="font-size: 16px; color: #000000; 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: #000000; font-style: normal;
font-family: 'times new roman', 'new york', times, serif;
background-color: transparent"> </div>
<div style="font-size: 16px; color: #000000; 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
<em>"Set it and forget it!"</em></span></div>
<div style="font-size: 16px; color: #000000; font-style: normal;
font-family: 'times new roman', 'new york', times, serif;
background-color: transparent"> </div>
<div style="font-size: 16px; color: #000000; 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 face="Arial" size="2"><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 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: #000000; font-family:
HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande',
sans-serif; background-color: #ffffff">
<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="./temp/part0.1382781792@t-online.de@medium[1].jpeg_medium[1].jpeg" alt="" /><br clear="none" />
</div>
<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" target="_blank" shape="rect" rel="nofollow" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none" />
<a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">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 />
<div class="yqt2180567864" id="yqt67490">_______________________________________________<br clear="none" />
Personal_Submersibles mailing list<br clear="none" />
<a href="mailto:Personal_Submersibles@psubs.org" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none" />
<a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none" />
</div>
<br />
<br />
</div>
</div>
</div>
</div>
</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>
<pre>_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles@psubs.org
<a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a>
</pre>