<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=UTF-8">
<META content="MSHTML 6.00.6000.16674" name=GENERATOR></HEAD>
<BODY id=role_body style="FONT-SIZE: 10pt; COLOR: #000000; FONT-FAMILY: Arial"
bottomMargin=7 leftMargin=7 topMargin=7 rightMargin=7><FONT id=role_document
face=Arial color=#000000 size=2>
<DIV>As in most projects, when you are 99% done, you only have 25% left to
do. That is how most projects in my work environment went. I always
told the project managers that when they reported their project status and
I was usually right. If I was wrong, they had more than 25% left to
go..... <IMG src="http://cdn-cf.aol.com/se/smi/0201d20638/08"></DIV>
<DIV> </DIV>
<DIV>Don</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>
<DIV>In a message dated 8/4/2008 7:30:18 A.M. Pacific Daylight Time,
gfowler@raytheon.com writes:</DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT
style="BACKGROUND-COLOR: transparent" face=Arial color=#000000
size=2><BR><FONT face=sans-serif size=2>Anthony</FONT> <BR><BR><FONT
face=sans-serif size=2>My new plane is 99.5% complete-all I have to do is
balance and align the wings-and then "re-learn" to fly. My kid just completed
the massive soccer "qualifying" tournament-6 games, two weekends, nothing
below 103F, so I am conditioned to start flying again.
<BR></FONT><BR><FONT face=sans-serif size=2><BR><BR><BR>Gray
Fowler<BR>Senior Principal Chemical Engineer<BR>Radomes and Specialty
Apertures<BR>Technical Staff Composites Engineering<BR>Raytheon</FONT>
<BR><BR><BR>
<TABLE>
<TBODY>
<TR vAlign=top>
<TD width="40%"><FONT face=sans-serif size=1><B>Anthony Romano
<anthonyr105@hotmail.com></B> </FONT><BR><FONT face=sans-serif
size=1>Sent by: nsrca-discussion-bounces@lists.nsrca.org</FONT>
<P><FONT face=sans-serif size=1>08/04/2008 09:17 AM</FONT>
<TABLE border=1>
<TBODY>
<TR vAlign=top>
<TD bgColor=white>
<DIV align=center><FONT face=sans-serif size=1>Please respond
to<BR>General pattern discussion
<nsrca-discussion@lists.nsrca.org></FONT></DIV></TD></TR></TBODY></TABLE><BR></P>
<TD width="59%">
<TABLE>
<TBODY>
<TR vAlign=top>
<TD>
<DIV align=right><FONT face=sans-serif size=1>To</FONT></DIV>
<TD><FONT face=sans-serif size=1>General pattern discussion
<nsrca-discussion@lists.nsrca.org></FONT>
<TR vAlign=top>
<TD>
<DIV align=right><FONT face=sans-serif size=1>cc</FONT></DIV>
<TD>
<TR vAlign=top>
<TD>
<DIV align=right><FONT face=sans-serif size=1>Subject</FONT></DIV>
<TD><FONT face=sans-serif size=1>Re: [NSRCA-discussion] Heat
Sinks</FONT></TD></TR></TBODY></TABLE><BR>
<TABLE>
<TBODY>
<TR vAlign=top>
<TD>
<TD></TD></TR></TBODY></TABLE><BR></TD></TR></TBODY></TABLE><BR><BR><BR><FONT
face=Tahoma size=2>Hi Gray,<BR>Glad to see you still lurking.<BR>First, saw
that technique to cool the batteries on the moon
rover.<BR><BR>Anthony<BR><BR><BR><BR><BR></FONT>
<HR>
<FONT face=Tahoma size=2><BR>To: nsrca-discussion@lists.nsrca.org<BR>From:
gfowler@raytheon.com<BR>Date: Mon, 4 Aug 2008 08:51:48 -0500<BR>Subject: Re:
[NSRCA-discussion] Heat Sinks<BR><BR></FONT><FONT face=sans-serif
size=2><BR>Guys</FONT><FONT face=Tahoma size=2> <BR></FONT><FONT
face=sans-serif size=2><BR>Considering that I do not fly E, this may not work,
but here is a trick from the missile world where the electronics generate
massive heat in a small package (no air cooling at mach 3!!) that must
be dissapated.</FONT><FONT face=Tahoma size=2> <BR></FONT><FONT
face=sans-serif size=2><BR>Heat sinks work well but rely on intimate contact
with the heat source, which can be the actual problem-how to get the battery
heat into the sink with the odd shape of the battery packs and the flatness of
the aluminum. Since you guys know the operating temperature of the dischaging
batteries, choose a wax that melts just below your target temperature. Cast
the wax around the battery pack (you need a container or tub-super thin
aluminum). Then have the cooling fins-heat sink on top. When the batteries
heat up the wax will melt. This phase change will cool the batteries-then the
viscous liquid wax will also efficiently transfer the heat to the aluminum tub
and the aluminum heat sink. The heat sink will cool the wax which then cool
the batteries.</FONT><FONT face=Tahoma size=2> <BR></FONT><FONT
face=sans-serif size=2><BR>After recharging, the batteries cool, the wax
resolidifies and it is ready to go all over again. Wax is light weight, the
aluminum tub-heatsink would need to be custom fabbed and very thin-and
basically sealed. Wax can be easily cleaned from the batteries if
needed.</FONT><FONT face=Tahoma size=2> <BR></FONT><FONT face=sans-serif
size=2><BR>Just a thought</FONT><FONT face=Tahoma size=2><BR></FONT><FONT
face=sans-serif size=2><BR><BR><BR><BR>Gray Fowler<BR>Senior Principal
Chemical Engineer<BR>Radomes and Specialty Apertures<BR>Technical Staff
Composites Engineering<BR>Raytheon</FONT><FONT face=Tahoma size=2>
<BR><BR><BR></FONT>
<TABLE>
<TBODY>
<TR vAlign=top>
<TD width="43%"><FONT face=sans-serif size=1><B>"Earl Haury"
<ejhaury@comcast.net></B> <BR>Sent by:
nsrca-discussion-bounces@lists.nsrca.org</FONT><FONT face=Tahoma size=3>
</FONT><FONT face=sans-serif size=1>08/01/2008 04:15 PM</FONT><FONT
face=Tahoma size=3> </FONT><BR>
<TABLE border=4>
<TBODY>
<TR vAlign=top>
<TD bgColor=white>
<DIV align=center><FONT face=sans-serif size=1>Please respond
to<BR>General pattern discussion
<nsrca-discussion@lists.nsrca.org></FONT></DIV></TD></TR></TBODY></TABLE><BR><FONT
face=Tahoma size=3><BR></FONT>
<TD width="56%">
<TABLE>
<TBODY>
<TR vAlign=top>
<TD width="8%">
<DIV align=right><FONT face=sans-serif size=1>To</FONT></DIV>
<TD width="91%"><FONT face=sans-serif
size=1><bob@toprudder.com>, "General pattern discussion"
<nsrca-discussion@lists.nsrca.org></FONT><FONT face=Tahoma
size=3> </FONT>
<TR vAlign=top>
<TD>
<DIV align=right><FONT face=sans-serif size=1>cc</FONT></DIV>
<TD>
<TR vAlign=top>
<TD>
<DIV align=right><FONT face=sans-serif size=1>Subject</FONT></DIV>
<TD><FONT face=sans-serif size=1>Re: [NSRCA-discussion] Heat
Sinks</FONT></TD></TR></TBODY></TABLE><BR><BR>
<TABLE>
<TBODY>
<TR vAlign=top>
<TD>
<TD></TD></TR></TBODY></TABLE><BR></TD></TR></TBODY></TABLE><BR><FONT
face=Tahoma size=2><BR><BR></FONT><FONT face=Tahoma size=3><BR>Bob</FONT><FONT
face=Tahoma size=2> </FONT><FONT face=Tahoma size=3><BR></FONT><FONT
face=Tahoma size=2> </FONT><FONT face=Arial size=3><BR>My thought is that
packs setting on something thermally conductive rather than insulating seems
better. Love your CO2 cartridge idea - wonder if AMA would consider that a
"gaseous boost".</FONT><FONT face=Tahoma size=2> </FONT><FONT face=Tahoma
size=3><BR></FONT><FONT face=Tahoma size=2> </FONT><FONT face=Arial
size=3><BR>Earl</FONT><FONT face=Tahoma size=3> <BR>----- Original Message
----- <B><BR>From:</B> </FONT><A title=mailto:bob@toprudder.com
href="mailto:bob@toprudder.com"><FONT face=Tahoma color=blue size=3><U>Bob
Richards</U></FONT></A><FONT face=Tahoma size=3> <B><BR>To:</B> </FONT><A
title=mailto:nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org"><FONT face=Tahoma color=blue
size=3><U>General pattern discussion</U></FONT></A><FONT face=Tahoma size=3>
<B><BR>Sent:</B> Friday, August 01, 2008 3:47 PM</FONT><FONT face=Tahoma
size=2> </FONT><FONT face=Tahoma size=3><B><BR>Subject:</B> Re:
[NSRCA-discussion] Heat Sinks</FONT><FONT face=Tahoma size=2> </FONT>
<TABLE>
<TBODY>
<TR vAlign=top>
<TD><FONT face=Tahoma size=3>I've been thinking about this, and I think
the best way would be sandwich thin pieces of aluminum between the cells
and extend past the edge of the pack. But I'm not sure I like the idea
of placing anything electrically conductive between the cells. Best to
provide an air space between the cells and duct the cooling air between
them. <BR> <BR>Of course, if you really want some wow-factor in the
setup, you would have a thermostatically controlled cowl flap that only
opens up once the pack starts to go beyond the optimum temperature.
Maybe even an emergency cooling system - a small CO2 cartridge from an
air rifle might do. ;-)<BR><BR>Bob R<BR><BR>--- On <B>Fri, 8/1/08, Jay
Marshall <I><lightfoot@sc.rr.com></I></B> wrote: </FONT><FONT
face=Arial color=#000080 size=2><BR>The idea of a real heat sink, maybe
with the fins as part of the skin of the plane and in the airstream, and
the LiPo cell edges bonded to the sink with thermal compound, has some
merit and may require some investigation – if cooling is what we really
want.</FONT><FONT face=Tahoma size=3> </FONT><BR><FONT
face="Times New Roman" size=3> </FONT><FONT face=Tahoma size=3>
</FONT><BR><FONT face=Tahoma size=3> </FONT></TD></TR></TBODY></TABLE>
<P>
<HR>
<BR><FONT face=Tahoma
size=3>_______________________________________________<BR>NSRCA-discussion
mailing
list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</FONT><FONT
face=Tahoma
size=2>_______________________________________________<BR>NSRCA-discussion
mailing
list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
<BR><BR><BR><BR><BR></FONT>
<HR>
<FONT face=Tahoma size=2>Got Game? Win Prizes in the Windows Live Hotmail
Mobile Summer Games Trivia Contest </FONT><A
title=http://www.gowindowslive.com/summergames?ocid=TXT_TAGHM
href="http://www.gowindowslive.com/summergames?ocid=TXT_TAGHM"
target=_new><FONT face=Tahoma color=blue size=2><U>Find out
how.</U></FONT></A><TT><FONT
size=2>_______________________________________________<BR>NSRCA-discussion
mailing
list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</FONT></TT>
<BR><BR><BR><BR><BR>_______________________________________________<BR>NSRCA-discussion
mailing
list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</FONT></BLOCKQUOTE></DIV></FONT><BR><BR><BR><DIV><FONT style="color: black; font: normal 10pt ARIAL, SAN-SERIF;"><HR style="MARGIN-TOP: 10px">Looking for a car that's sporty, fun and fits in your budget? <A title="http://autos.aol.com/cars-BMW-128-2008/expert-review?ncid=aolaut00050000000017" href="http://autos.aol.com/cars-BMW-128-2008/expert-review?ncid=aolaut00050000000017" target="_blank">Read reviews on AOL Autos</A>.</FONT></DIV></BODY></HTML>