<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
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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:"Calibri","sans-serif";color:#1F497D'>There is no harm to the batteries or ESC from the spark. There can be some erosion on the connectors from the arcing. Most connectors suffer the erosion on the ends of the connectors, and not on the mating surfaces….in which case, the erosion really doesn’t cause a problem.<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'>Anti-spark arming circuits that are in the primary power delivery pathway are a potential point of failure. Much better to use a secondary parallel pathway to absorb the spark and charge the caps, and then plug in the primary leads, and then disconnect the secondary ones.<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'>Regards,<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'>Dave<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><div><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 [mailto:nsrca-discussion-bounces@lists.nsrca.org] <b>On Behalf Of </b>learn2turn via NSRCA-discussion<br><b>Sent:</b> Sunday, February 22, 2015 4:22 PM<br><b>To:</b> nsrca-discussion@lists.nsrca.org<br><b>Subject:</b> Re: [NSRCA-discussion] arm/disarm 10S<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div id="yui_3_16_0_1_1424639803759_3162"><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:helveticaneue;color:black'>Regarding an arming system, I don't fly 10S but from what I understand when you are up around 8-10S it is a bad idea to connect the batteries directly. The caps on the front-end of the ESC can instantly draw a huge surge of current for a short time. The arming systems for that sized pack usually have a button with a resister in series. You hit the button for a few seconds and that lets the caps charge up slowly. Then you plug the full-current connector in.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1424639803759_3163"><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:helveticaneue;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1424639803759_3164"><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:helveticaneue;color:black'>-Ken<o:p></o:p></span></p></div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:helveticaneue;color:black'><o:p> </o:p></span></p><div id="yui_3_16_0_1_1424639803759_2679"><div id="yui_3_16_0_1_1424639803759_2678"><p class=MsoNormal style='background:white'><span style='font-family:helveticaneue;color:black'><o:p> </o:p></span></p></div></div></div></div></body></html>