<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:14pt"><div><font size="3" face="Times New Roman">
</font></div><div style="margin: 0in 0in 10pt;"><font size="3" face="Calibri">I am considering a scheme for dealing with electric motor
cooling and would like input on the viability of the idea and any pros or cons
that I may be missing.</font><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></div><div><font size="3" face="Times New Roman">
</font></div><div style="margin: 0in 0in 10pt;"><font size="3" face="Calibri">In looking at my SeeHund replica, note that the
torpedo/pod(s) length exceed needed battery capacity. <span style="mso-spacerun: yes;"> </span>So the idea being that the aft ends of both
will house electric motors that are isolated from the battery compartments.</font><o:p></o:p></div><div><font size="3" face="Times New Roman">
</font></div><div style="margin: 0in 0in 10pt;"><font size="3" face="Calibri">I’m thinking to ventilate these aft motor units into the aft
machinery space within the main hull. Incidentally, the hull diameter will be
42” and the torpedoes #14 pipe. This will leave a significant airspace around
these motor units allowing me to use fan cooled motor cases.<span style="mso-spacerun: yes;"> </span>Each motor pod could be connected with vent
pipes for intake and output airflow, then the machinery space itself force
vented to the outside with <span style="mso-spacerun: yes;"> </span>main
induction and exhaust vents. <span style="mso-spacerun: yes;"> </span>All this
for continuous surface running of course. Submerged, the motor units would be
intermittent duty.</font><o:p></o:p></div><div><font size="3" face="Times New Roman">
</font></div><div style="margin: 0in 0in 10pt;"><font size="3" face="Calibri">The centerline unit would be fully enclosed and not vented,
therefore not as attractive for continuous duty due to thermal constraints.</font><o:p></o:p></div><div><font size="3" face="Times New Roman">
</font></div><div style="margin: 0in 0in 10pt;"><o:p><font size="3" face="Calibri"> </font></o:p></div><div><font size="3" face="Times New Roman">
</font></div><div style="margin: 0in 0in 10pt;"><font size="3" face="Calibri">Joe</font><o:p></o:p></div><div><font size="3" face="Times New Roman">
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