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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D'>Bob…you might note the internal resistance of each cell after the end of the charge cycle.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D'>I had something similar happen to me a couple of weeks ago….unfortunately…I had turned off the logs so I can’t say for sure what happened…but the motor just didn’t have enough power to pull much of a vertical climb….I tried it twice and it did the same thing so I went home rather than risk anything.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D'>I don’t know what happened….the same pack and motor perform as usual yesterday and the day before……but…I did notice that the IR is climbiong on all cells.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D'>They are approaching 5miliohms now.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.5pt;font-family:"Comic Sans MS";color:#1F497D'>Dave Harmon<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.5pt;font-family:"Comic Sans MS";color:#1F497D'>NSRCA 586<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.5pt;font-family:"Comic Sans MS";color:#1F497D'>K6XYZ[at]sbcglobal[dot]net<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.5pt;font-family:"Comic Sans MS";color:#1F497D'>Sperry, Ok.<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><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>Peter Vogel<br><b>Sent:</b> Monday, September 17, 2012 3:34 PM<br><b>To:</b> Bob Kane; General pattern discussion<br><b>Subject:</b> Re: [NSRCA-discussion] Battery going bad?<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Sounds like at least one cell is dropping significantly under high current loads.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Peter+<o:p></o:p></p><div><p class=MsoNormal>On Mon, Sep 17, 2012 at 1:32 PM, Bob Kane <<a href="mailto:getterflash@yahoo.com" target="_blank">getterflash@yahoo.com</a>> wrote:<o:p></o:p></p><div><div><div><p class=MsoNormal>I had something happen Saturday that is new for me . . . . I was going to put up a flight with my 62" Osiris for a club airshow, I advanced the throttle to take off, the plane accelerated, then the motor quit. The Castle Controller was emitting two beeps, indicating a low voltage error. One of the club members had a meter that measures individual cell voltages and everything looked OK. I used another pack to put up a flight with no issues.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>When I got home I discharged the suspect pack and recharged it. I flew it yesterday and it seemed to work OK. I was practicing(!) some maneuvers repeatedly and the pack quit unexpectedly again, but it may have been my fault for not paying attention to the flight time.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Is this a sign of pending failure? The pack has maybe 30 cycles on it. I have had other packs get puffy and weak but this pack is rock solid. The pack is a Rhino 5S 5000mAH 25C pack.<o:p></o:p></p></div><div><p class=MsoNormal><span style='color:#888888'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:#888888'>Bob Kane<br><a href="mailto:getterflash@yahoo.com" target="_blank">getterflash@yahoo.com</a><o:p></o:p></span></p></div></div></div><p class=MsoNormal><br>_______________________________________________<br>NSRCA-discussion mailing list<br><a href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a><br><a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" target="_blank">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><o:p></o:p></p></div><p class=MsoNormal><br><br clear=all><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <o:p></o:p></p><div><p class=MsoNormal>Director, Fixed Wing Flight Training<o:p></o:p></p></div><div><p class=MsoNormal>Santa Clara County Model Aircraft Skypark<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><img border=0 width=200 height=154 id="_x0000_i1025" src="http://farm8.staticflickr.com/7163/6513778381_5569cc985d_m.jpg"><o:p></o:p></p></div></div></body></html>