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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Cheaper NiMH cells have high internal resistance which causes
the voltage to drop under high current loads. NiCads do not have this
problem. NiMH are fine as long as you know the cells you are using can
handle the demand you are placing on them.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Good info on NiMH as it relates to R/C: <a
href="http://www.rcbatteryclinic.com/ni-mh.html">http://www.rcbatteryclinic.com/ni-mh.html</a>
<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>- Robert Beaubien<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>- AMA #618061 / NCRCA #4121<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>-<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <b>On Behalf Of </b>Jay
Marshall<br>
<b>Sent:</b> Friday, January 11, 2008 10:29 AM<br>
<b>To:</b> chad@f3acanada.org; 'NSRCA Mailing List'<br>
<b>Subject:</b> Re: [NSRCA-discussion] Futaba Servos<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>The servos are rated at 6 volts – no problem here. My
question was why the NiCd limitation. I suspect they want to avoid NiMh because
of the high initial current drain. LiPo shouldn’t have this problem.</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'> </span><o:p></o:p></p>
<div>
<p><b><i><span style='font-size:13.5pt;font-family:"Brush Script MT";
color:navy'>Jay Marshall</span></i></b><span style='color:navy'> </span><o:p></o:p></p>
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<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'>-----Original Message-----<br>
<b>From:</b> nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <b>On Behalf Of </b>Chad
Northeast<br>
<b>Sent:</b> Friday, January 11, 2008 9:10 AM<br>
<b>To:</b> NSRCA Mailing List<br>
<b>Subject:</b> Re: [NSRCA-discussion] Futaba Servos</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'>Hi Jay<br>
<br>
I ran those servos regulated to 6V, the 4.8 thing has to do with unregulated
Nicads as has been mentioned. You can get a pretty high voltage on a 6V
pack.<br>
<br>
If you regulate a 2s lipo you wont have any problems with those servos.
One of the pluses of a brushless is that is should be more tolerant of higher
voltages anyways, but I have not tried higher than that. Maybe some of
Ed's new regs are in order so I can play around! :)<br>
<br>
Chad<br>
<br>
----- Original Message -----<br>
From: Jay Marshall <lightfoot@sc.rr.com><br>
Date: Friday, January 11, 2008 6:08 am<br>
Subject: [NSRCA-discussion] Futaba Servos<br>
To: nsrca-discussion@lists.nsrca.org<br>
<br>
> I am planning to use the new Futaba BLM 451 servos in my new <br>
> plane. I had<br>
> also planned to use a 2S LiPo battery and Castle Creation's new <br>
> BEC for the<br>
> system power. The servos, however, have a note on the box "Ni-Cd <br>
> Use Only"<br>
> Does anyone know why? I can't find any reference to this spec on <br>
> the Futaba<br>
> site (although I might have missed it).<br>
> <br>
> <br>
> <br>
> Jay Marshall <br>
> <br>
> <br>
> <br>
> <o:p></o:p></p>
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