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<DIV><FONT face=Arial size=2>Sounds heavy. Don't electric airplanes have trouble
making weight (except for Dave Lockhart's of course)? What are you guys doing
for letting air in / out of the fuse. Without proper airflow, even a good heat
sink won't work. Actually wouldn't it be better to make some kind of (light
weight) thermostatically controlled cooling system? Cold LiPOs don't make
optimum power.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>John Pavlick<BR><A
href="http://www.idseng.com">http://www.idseng.com</A></FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=ejhaury@comcast.net href="mailto:ejhaury@comcast.net">Earl Haury</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">Discussion List, NSRCA</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, July 31, 2008 9:49
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion] Heat
Sinks</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial>We all tend to mount E batteries on some sort of wooden
/ carbon / nomex shelf and tie them down with Velcro or a clamp plate - none
of which are very good at transferring heat. Possibly we could improve heat
transfer from the batts to the cooling air by using aluminum, or better yet -
finned aluminum heatsink material for the shelf / clamp. </FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I've spent a fair bit of time trying for find
appropriate heatsink material online - something 4" long x 3" wide with a high
count of thin, maybe 1/4 high, fins might work. Unfortunately, there's
tons of heatsink material available from Newark, Mauser, etc. but it's
difficult to find the right stuff - especially material light enough for our
use. The closest I've come is Thermaflo # E1243, but I'm lacking a small
quantity source. </FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Anybody work with this stuff & have recommendations
or sources?</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Earl</FONT></DIV>
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