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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>John:</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>You should not need any kind of signal
buffer. The main problem with long leads is excessive voltage drop due to
higher resistance if the wire gauge is too light. Just use 22AWG and also
avoid any tin plated connectors and you should be fine. Braided wire can be
helpful, but isn’t really necessary most of the time. </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Re. the use of either Lithium Ion or
Lithium Polymer batteries, yes, you need a regulator. The Jaccio works
really well. I also make regulators that are adjustable and fill a niche
if you have a need for redundant batteries and want some additional flexibility
in the setup. Either solution can work. And you are correct that a 480
mAh pack isn’t a lot of capacity, however with a good LiPo, there ability
to deliver current on demand is more than adequate. Capacity for some
number of flights is the bigger question. </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The electric powered pattern models use a
very small amount of current in flight because of the virtual elimination of
vibration from the power plant, so you will see guys going all weekend with a
pair of 2S480 packs. I still fly glow and use a pair of 730mAh packs.</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Ed</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><span style='font-weight:bold'>From:</span></b> nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>John Ford<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, December 12, 2007
11:10 PM<br>
<b><span style='font-weight:bold'>To:</span></b> NSRCA Mailing List<br>
<b><span style='font-weight:bold'>Subject:</span></b> [NSRCA-discussion] Servo
wire and battery questions</span></font></p>
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style='font-size:12.0pt'> </span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Hi all,</span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Return-to-pattern after a long time questions...</span></font></p>
</div>
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style='font-size:12.0pt'> </span></font></p>
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<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Question #1</span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>I used to use JR servo amplifiers on servos to
eliminate noise and ensure strong signal over a long servo lead,
especially to the back of the plane. Few of these, if any, are available
commercially now, so I assume that there is little need for them any more? (Was
never convinced they served a purpose to begin with, but I had never built a
plane without them, and never had a problem)</span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>I will be using JR 955 RX and digital servos. </span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Maybe as simple an answer as "never an issue,
regardless of servo wire length".</span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Maybe I should twist my wires?</span></font></p>
</div>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
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<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Question #2</span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>I used to use nothing other than large SR nicads for
the flight pack, usually 1100mAh.</span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>I notice that folks are now using Thunder Power
Li-Po batteries, some as small as 480mAh, and several around 800mAh.
Doesn't seem to be much capacity to run six digitals.</span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>I assume there is a Jaccio regulator to cut it down to
5V or so. Are Li-Pos reliable enough that only one cell is used, or are some
folks using a SmartFly dual battery regulator that ignores one battery if it
should fail?</span></font></p>
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style='font-size:12.0pt'> </span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>I appreciate any calibration on what the
"standard" setup might be. </span></font></p>
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style='font-size:12.0pt'> </span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Thanks,</span></font></p>
</div>
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style='font-size:12.0pt'> </span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>John</span></font></p>
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