<div dir="ltr">yes they do<div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Aug 1, 2015 at 8:48 AM, Bill Carder <span dir="ltr"><<a href="mailto:bc3662@aol.com" target="_blank">bc3662@aol.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><font color="black" size="2" face="arial">
<div>And they fly really straight and level!!!</div>
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<div style="color:black;font-family:arial,helvetica;font-size:10pt"><span class="">-----Original Message-----<br>
From: Patrick Harris via NSRCA-dist8 <<a href="mailto:nsrca-dist8@lists.nsrca.org" target="_blank">nsrca-dist8@lists.nsrca.org</a>><br>
To: Gordon Anderson <<a href="mailto:gaa@owt.com" target="_blank">gaa@owt.com</a>><br>
Cc: AK, ID, MT, OR, WA, WY, MT, OR, WA, WY <<a href="mailto:nsrca-dist8@lists.nsrca.org" target="_blank">nsrca-dist8@lists.nsrca.org</a>><br>
Sent: Sat, Aug 1, 2015 8:19 am<br>
Subject: Re: [NSRCA-dist8] Battery checkers<br>
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And they parallel charge.
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On Sat, Aug 1, 2015 at 8:07 AM, Patrick Harris
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Pretty much everyone around here uses or have changed over to Dean's.
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On Sat, Aug 1, 2015 at 7:18 AM, Gordon Anderson
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I use 5.5mm bullet connectors everywhere except the arming plug, I use a deans connector for the arming plug. I have been pretty happy with the 5.5mm bullet connectors and the batteries I get from hobby king come with the connectors installed.
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--G
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On Aug 1, 2015, at 6:38 AM, Lyle Laughery via NSRCA-dist8 <
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<div dir="ltr">Now that all of you have beat the wadding out of battery checking can you help this soon to be electric flier,choose the best battery connectors between the speed controller and battery .Castle 80 and 5000 battery?</div>
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On Jul 31, 2015 8:55 PM, "Patrick Harris via NSRCA-dist8" <
<a href="mailto:nsrca-dist8@lists.nsrca.org" target="_blank">nsrca-dist8@lists.nsrca.org</a>> wrote:
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Real men fly eight times....102....wuss!
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On Fri, Jul 31, 2015 at 8:43 PM, Karl Watts
<span dir="ltr"><<a href="mailto:karlwatt@sarmc.org" target="_blank">karlwatt@sarmc.org</a>></span> wrote:
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Eight times! You need counseling. I flew 3 times, 102 degrees and became more gusty. Went home for a beer and we were out.
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Sent from my iPad
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On Jul 31, 2015, at 8:50 PM, Patrick Harris via NSRCA-dist8 <
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I flew eight times today and my twisty thing in the front went round and round and yes boys and girls, I am proud to say "I am an admitted Parallel Charger." Can I get an AMEN!
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On Fri, Jul 31, 2015 at 5:58 PM, Gordon Anderson
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Don't get me started on parallel charging!
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On Jul 31, 2015, at 5:15 PM, Patrick Harris via NSRCA-dist8 <
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OMG...Jim...don't say "parallel charging' around Gordon....he'll have a fit! \uD83D\uDE00
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On Fri, Jul 31, 2015 at 3:59 PM, James Hiller
<span dir="ltr"> <<a href="mailto:jnhiller@earthlink.net" target="_blank">jnhiller@earthlink.net</a>></span> wrote:
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<div class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">Tried to fly today 17 MPH 101 degrees, this is getting old.<u></u><u></u></span></div>
<div class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">I use a free volt meter from HARBOR freight to check before flying to insure I'm not installing a used pack.<u></u><u></u></span></div>
<div class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">Before charging I check the voltage of each twin 5S pack to select packs with nearly the same voltage - usually within 2/10 V before parallel charging. I always charge at 1C. <span>Takes about two beers to recharge a day's usage.</span><u></u><u></u></span></div>
<div class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">I monitor charge Mah, which is a total when parallel charging, that I average to a single battery to get a feel for per flight consumption.<u></u><u></u></span></div>
<div class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">Occasionally I'll charge individual batteries to try to negate the affects of parallel charging.<u></u><u></u></span></div>
<div class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">I've also noticed it takes longer to balance when the batteries are getting tired and I'll check the IR for weak cells <span>( IR</span> Spread ). <u></u><u></u></span></div>
<div class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">I'm also not working the batteries very hard only gaining maybe 20 degrees over ambient. <u></u><u></u></span></div>
<div class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">Jim<u></u><u></u></span></div>
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<div class="MsoNormal"><b><span style="font-family:"Tahoma","sans-serif";font-size:10pt">From:</span></b><span style="font-family:"Tahoma","sans-serif";font-size:10pt"> NSRCA-dist8 [mailto:<a href="mailto:nsrca-dist8-bounces@lists.nsrca.org" target="_blank">nsrca-dist8-bounces@lists.nsrca.org</a>] <b>On Behalf Of </b>Patrick Harris via NSRCA-dist8<br>
<b>Sent:</b> Friday, July 31, 2015 3:32 PM<br>
<b>To:</b> Gordon Anderson<span><br>
<b>Cc:</b> AK, ID, MT, OR, WA, WY<br>
</span><span><b>Subject:</b> Re: [NSRCA-dist8] Battery checkers<u></u><u></u></span></span></div>
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<div class="MsoNormal">All very true. I pick up on average about 5 percent after my packs set awhile. I find the checker I use to be pretty close, but always about 5 to 10 percent off what the true level based on what I actually put back into them. <u></u><u></u></div>
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<div class="MsoNormal">On Fri, Jul 31, 2015 at 3:25 PM, Gordon Anderson <<a href="mailto:gaa@owt.com" target="_blank">gaa@owt.com</a>> wrote:<u></u><u></u></div>
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<div class="MsoNormal">Karl,<u></u><u></u></div>
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<div class="MsoNormal">Here is my 2 cents worth....<u></u><u></u></div>
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<div class="MsoNormal">Predicting battery capacity from the open terminal voltage is not very accurate, I believe that is where this capacity prediction is coming from. I will bet if you let the batteries "rest" a few minutes after your flight and then check them again the capacity values will change. Battery chemistry is very non linear. I think the best predictor of battery health is the internal resistance, a lot of chargers will calculate and display this value. Keep an eye on trends, as the batteries age the internal resistance will increase and they will also get hotter during the flight and eventually start to puff up. The nice thing about monitoring IR is you can see if a cell is getting significantly different than the rest of the cells in the pack.<u></u><u></u></div>
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<div class="MsoNormal">The best way to know the capacity you have taken from the pack is to use a data logger that is measuring voltage and current and then calculating the maHr usage. Even in this case you will have to put more back in than you took out, this is because of the IR that burns some up in heat and the fact that the process is not linear.<u></u><u></u></div>
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<div class="MsoNormal">On Jul 31, 2015, at 12:11 PM, Karl Watts <<a href="mailto:karlwatt@sarmc.org" target="_blank">karlwatt@sarmc.org</a>> wrote:<u></u><u></u></div>
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<div class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">Do any of you guys or gals use battery checkers? Are they reliable? I have one that I use to check my batteries before and after I fly. For my flight packs – 2 5000 mAh packs it consistently reads 97-99% and after flying 14-33%. My confusion is when I take a pack that say reads 14% after flying and charge it I am only putting in about 3000 mAh. Seems to me the battery checker should show 40% not 14%, I used 3000 mAh which is 60% of the pack. Should I discard the battery checker?</span><u></u><u></u></div>
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<div class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">Karl</span><u></u><u></u></div>
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