<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Gordon,<div><br></div><div>I suspected that. I was thinking of building a gadget that lit up an LED if the voltage was over 41 or so. It could be very inexpensive and could save a set of expensive batteries. I have seen more than one guy take off with batteries they thought they had charged. They found out only when the voltage had dropped too low. I almost did it once but I had an Eagle Tree TM system and checked the voltage before I took off. I don't always use the ET so it would be nice to have another painless way to know the packs are charged.</div><div><br></div><div>Jim </div><div><br></div><div> <br><div><div>On Aug 29, 2008, at 6:16 AM, Gordon Anderson wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"> <div style="WORD-WRAP: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space"> <div dir="ltr" align="left"><span class="937321313-29082008"><font face="Comic Sans MS" color="#0000ff">Jim,</font></span></div> <div dir="ltr" align="left"><span class="937321313-29082008"><font face="Comic Sans MS" color="#0000ff"></font></span> </div> <div dir="ltr" align="left"><span class="937321313-29082008"><font face="Comic Sans MS" color="#0000ff">The maestro will not accept a 42 volt input. It was designed as a flight pack testing system and includes a programmable battery load. It will calculate and display the packs internal resistance as well. </font></span></div> <div dir="ltr" align="left"><span class="937321313-29082008"><font face="Comic Sans MS" color="#0000ff"></font></span> </div> <div dir="ltr" align="left"><span class="937321313-29082008"><font face="Comic Sans MS" color="#0000ff">--Gordon</font></span></div><br> <div class="OutlookMessageHeader" lang="en-us" dir="ltr" align="left"> <hr tabindex="-1"> <font face="Tahoma" size="2"><b>From:</b> nsrca-discussion-bounces@lists.nsrca.org [<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org">mailto:nsrca-discussion-bounces@lists.nsrca.org</a>] <b>On Behalf Of </b>James Oddino<br><b>Sent:</b> Thursday, August 28, 2008 4:18 PM<br><b>To:</b> General pattern discussion<br><b>Subject:</b> Re: [NSRCA-discussion] FW: ESVs for flight pack lipos?<br></font><br></div> <div></div>What is the voltage range? I'd like to have a unit that would stay in the plane and tell me that my 42 volt battery is charged when I plug it in. <div><br></div> <div>Jim</div> <div><br></div> <div><br> <div> <div>On Aug 28, 2008, at 3:42 PM, Derek Koopowitz wrote:</div><br class="Apple-interchange-newline"> <blockquote type="cite"><span class="Apple-style-span" style="WORD-SPACING: 0px; FONT: 18px Helvetica; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BORDER-COLLAPSE: separate; orphans: 2; widows: 2; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0"> <div class="hmmessage" style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> <div dir="ltr" align="left"><span class="343253922-28082008"><font face="Arial" color="#0000ff">I bought mine from Gordon Anderson...</font></span></div> <div dir="ltr" align="left"><span class="343253922-28082008"><font face="Arial" color="#0000ff"></font></span> </div> <div dir="ltr" align="left"><span class="343253922-28082008"><font face="Arial" color="#0000ff"><a href="http://www.mstar2k.com/">http://www.mstar2k.com/</a></font></span></div> <div dir="ltr" align="left"><span class="343253922-28082008"><font face="Arial" color="#0000ff"></font></span> </div> <div dir="ltr" align="left"><span class="343253922-28082008"><font face="Arial" color="#0000ff">Look for the Maestro on his page.</font></span></div><br> <div class="OutlookMessageHeader" lang="en-us" dir="ltr" align="left"> <hr tabindex="-1"> <font face="Tahoma"><b>From:</b><span class="Apple-converted-space"> </span><a href="mailto:nsrca-discussion-bounces@lists.nsrca.org">nsrca-discussion-bounces@lists.nsrca.org</a><span class="Apple-converted-space"> </span>[<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org">mailto:nsrca-discussion-bounces@lists.nsrca.org</a>]<span class="Apple-converted-space"> </span><b>On Behalf Of<span class="Apple-converted-space"> </span></b>Richard Strickland<br><b>Sent:</b><span class="Apple-converted-space"> </span>Thursday, August 28, 2008 11:36 AM<br><b>To:</b><span class="Apple-converted-space"> </span>NSRCA DISCUSSION<br><b>Subject:</b><span class="Apple-converted-space"> </span>[NSRCA-discussion] FW: ESVs for flight pack lipos?<br></font><br></div> <div></div><br>I'm switching some of my stuff to 2 cell lipos into a regulator (learned the hard way that you separate the regulator on the OTHER side of the switch from the battery--but that's another story).<br>The question(s): What is a good, relatively small ESV that has a load to check the lipos? What voltage do you let them get down to before no go?<br>My 30 year old SO (Ye Olde ESV) ranges just miss that middle ground. I've got a voltmeter--but it's not loaded. On a 1200 pack(still lighter than 4 nicads WITH reg.) on four flights, the drop was from 8.4 down to 8.25V. I'm going to a 780 on another airplane and my understanding guys are getting up to 7-8 flights on that size pack. But how do you check them?<br> <br>Thanks,<br> <br>Richard<br><br> <hr> See what people are saying about Windows Live. Check out featured posts.<span class="Apple-converted-space"> </span><a href="http://www.windowslive.com/connect?ocid=TXT_TAGLM_WL_connect2_082008" target="_blank">Check It Out!</a><span class="Apple-converted-space"> </span><br> <hr> Talk to your Yahoo! 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