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<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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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=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></BODY></HTML>