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<DIV><FONT face=Arial size=2>Hi Dean,</FONT></DIV>
<DIV><FONT face=Arial size=2>This could be a problem if the current and voltage
drop were both high. In practice the battery voltage drops if you pull
high currents so you don't see a 3 volt drop. The thing that can cause a
problem is dual servos on a surface fighting each other and tail rotor servos in
helicopters. I have not seen a problem in pattern planes but a heat
sink would help if you had a problem. </FONT></DIV>
<DIV><FONT face=Arial size=2>Jim</FONT></DIV>
<BLOCKQUOTE dir=ltr
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; font-color: black"><B>From:</B>
<A title=d.pappas@kodeos.com href="mailto:d.pappas@kodeos.com">Dean Pappas</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, February 03, 2005 1:29
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: any merit in running dual
battery packs ?</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=464542521-03022005><FONT face=Arial color=#0000ff
size=2>Hello Urs,</FONT></SPAN></DIV>
<DIV><SPAN class=464542521-03022005><FONT face=Arial color=#0000ff size=2>The
Jaccio regulator is a great item, but I am concerned about running with more
than 3 volts of headroom: this increases the power
dissipation.</FONT></SPAN></DIV>
<DIV><SPAN class=464542521-03022005><FONT face=Arial color=#0000ff size=2>It
may simply require a heat sink be added to the regulator component. That is
usually just a tin or brass fin soldered to the big tab on the
IC.</FONT></SPAN></DIV>
<DIV><SPAN class=464542521-03022005><FONT face=Arial color=#0000ff size=2>Jim?
Whadda you think?</FONT></SPAN></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><SPAN class=464542521-03022005><FONT face=Arial color=#0000ff
size=2>Regards,</FONT></SPAN></DIV>
<P><FONT face="Times New Roman">Dean Pappas</FONT> <BR><FONT
face="Times New Roman">Sr. Design Engineer</FONT> <BR><FONT
face="Times New Roman">Kodeos Communications</FONT> <BR><FONT
face="Times New Roman">111 Corporate Blvd.</FONT> <BR><FONT
face="Times New Roman">South Plainfield, N.J. 07080</FONT> <BR><FONT
face="Times New Roman">(908) 222-7817 phone</FONT> <BR><FONT
face="Times New Roman">(908) 222-2392 fax</FONT> <BR><FONT
face="Times New Roman">d.pappas@kodeos.com</FONT> </P>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
discussion-request@nsrca.org [mailto:discussion-request@nsrca.org]<B>On
Behalf Of </B>Bärtschiger Urs<BR><B>Sent:</B> Thursday, February 03, 2005
3:53 PM<BR><B>To:</B> discussion@nsrca.org<BR><B>Subject:</B> Re: any merit
in running dual battery packs ?<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>Hi Jim,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Many thanks. I have the Jaccio already. I
use it in conjunction with a 5 cell Nicad. Can I just connect it to a Li-Ion
battery or are there prior readjustments to be made? </FONT><FONT
face=Arial size=2>TIA</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Urs </FONT></DIV>
<DIV><FONT face=Arial size=2>NSRCA #3069</FONT></DIV>
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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; font-color: black"><B>From:</B>
<A title=joddino@socal.rr.com
href="mailto:joddino@socal.rr.com">J.Oddino</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, January 29, 2005
11:44 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: any merit in running
dual battery packs ?</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Hi Urs,</FONT></DIV>
<DIV><FONT face=Arial size=2>I like the 18650 cells that are in the 2000
to 2400 mAh range now. These are the cylindrical cells with metal
cans like Central Hobbies sells. I believe they are more rugged than
the Li-Poly cells and one doesn't need to worry about taking them out of
the plane to charge. I use the Jaccio Perfect Switch Harness but I'm
biased because I make them.</FONT></DIV>
<DIV><FONT face=Arial size=2>Regards,
Jim</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>