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<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>
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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=baertschiger-tai@bluewin.ch
href="mailto:baertschiger-tai@bluewin.ch">Bärtschiger Urs</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 2:12
AM</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 Jim,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Fully agree with your statements. </FONT></DIV>
<DIV><FONT face=Arial size=2>Questions: </FONT></DIV>
<DIV><FONT face=Arial size=2>- Which capacity Li-Ion battery are you
recommending for a pattern plane equipped with digitals?</FONT></DIV>
<DIV><FONT face=Arial size=2>- Which solid state failsafe voltage regulator
switch harness do you consider suitable?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks for your comments.</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>
<DIV><FONT face=Arial size=2></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=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> Friday, January 28, 2005 8:14
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>Two packs and two switch harnesses are good
from the standpoint of eliminating single point failures and they would
minimize voltage drops between the battery and receiver buss as the current
in each would be cut in half thereby reducing the voltage drop by a factor
of two. The down side is the added weight and cost. I'm using
two in my third scale plane but have stuck with single packs in my pattern
size planes. If you go with one battery and one switch I'd recommend a
solid state failsafe voltage regulator type switch harness and a Li-Ion
pack. The higher capacity of Li-Ion takes care of the added current we
see with the digitals and the higher voltage allows better regulation at a
higher voltage resulting in more servo torque and speed (more power).
With the voltage regulator you don't need to worry about voltage drops
between the battery and the buss.</FONT></DIV>
<DIV><FONT face=Arial size=2>Jim</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=hitesh@salt.ac.za href="mailto:hitesh@salt.ac.za">Hitesh
Gajjar</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> Monday, January 24, 2005 4:13
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> any merit in running dual
battery packs ?</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=095360912-24012005>Hi,</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=095360912-24012005></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=095360912-24012005>Now that we all using high powered digital
servo's with incredible holding power etc - is there any merit in running
2 battery packs, say 1 Ah each as opposed to 1 high capacity
pack thereby eliminating the single point failure ? If I did want to
run 2 packs, is a diode necessary to prevent 1 pack from possibly charging
the other if 1 pack were to go bad ?</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=095360912-24012005></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=095360912-24012005>Cheers,</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=095360912-24012005>Hitesh</SPAN></FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>