<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Jeremy, </DIV>
<DIV> </DIV>
<DIV>At the nats, finals morning, I noticed my first flight I was way down on power as my batts were cool. I put them in Jerry Budd's warmer and noticed a big difference in power. I do believe that the packs operate more efficiently at "operating" temperature. I'm sure you know this as you are a genius when it comes to electrics!!<IMG src="http://mail.yimg.com/us.yimg.com/i/mesg/tsmileys2/03.gif"></DIV>
<DIV>I didn't make it down to your site as Masters flew at the same time as you. Do you have any pics you can forward me for the Kfactor? </DIV>
<DIV> </DIV>
<DIV>Nice meeting you! You should come out to our District championship on November 1st and 2nd!! Will be nice weather out here in Cali.....<IMG src="http://mail.yimg.com/us.yimg.com/i/mesg/tsmileys2/04.gif"><BR></DIV>
<DIV><STRONG><EM><FONT face="comic sans ms" color=#0000bf size=3>Chris </FONT></EM></STRONG></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV><BR><BR>--- On <B>Thu, 7/31/08, JEREMY CHINN <I><lagrue@hotmail.com></I></B> wrote:<BR>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(16,16,255) 2px solid">From: JEREMY CHINN <lagrue@hotmail.com><BR>Subject: Re: [NSRCA-discussion] Heat Sinks<BR>To: "General pattern discussion" <nsrca-discussion@lists.nsrca.org><BR>Date: Thursday, July 31, 2008, 8:06 PM<BR><BR>
<DIV id=yiv67458629>
<STYLE>
#yiv67458629 .hmmessage P
{
margin:0px;padding:0px;}
#yiv67458629 {
FONT-SIZE:10pt;FONT-FAMILY:Tahoma;}
</STYLE>
The assessment on my Kudzu at the Nats was that my batteries never even got to optimum operating temperature...... <BR><BR>
<HR>
From: jpavlick@idseng.com<BR>To: nsrca-discussion@lists.nsrca.org<BR>Date: Thu, 31 Jul 2008 22:12:06 -0400<BR>Subject: Re: [NSRCA-discussion] Heat Sinks<BR><BR>
<STYLE>
</STYLE>
<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/" target=_blank rel=nofollow>http://www.idseng.com</A></FONT></DIV>
<BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial"><B>From:</B> <A title=ejhaury@comcast.net href="mailto:ejhaury@comcast.net" target=_blank rel=nofollow>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" target=_blank rel=nofollow>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>
<HR>
<DIV><BR>_______________________________________________<BR>NSRCA-discussion mailing list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</DIV></BLOCKQUOTE><BR>
<HR>
Use video conversation to talk face-to-face with Windows Live Messenger. <A href="http://www.windowslive.com/messenger/connect_your_way.html?ocid=TXT_TAGLM_WL_Refresh_messenger_video_072008" target=_blank rel=nofollow>Get started.</A> </DIV><PRE>_______________________________________________
NSRCA-discussion mailing list
NSRCA-discussion@lists.nsrca.org
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</PRE></BLOCKQUOTE></td></tr></table><br>