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Interestingly enough, the batteries in my bird at the NATS never even got up to operating temperature....and the last flight was done with the throttle essentially as an on-off switch..... <BR><BR>
Of course it is an 'anti-widebody' design..... : )<BR>
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From: natpenton@centurytel.net<BR>To: nsrca-discussion@lists.nsrca.org<BR>Date: Mon, 8 Sep 2008 17:08:25 -0500<BR>Subject: Re: [NSRCA-discussion] Electric pattern recommended equipment<BR><BR><BR>
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<DIV><FONT face=Arial>Heat is public enemy number 1 as far as Lipo battery life is concerned. If you can keep cell temps below 150F you can expect 150 plus cycles.</FONT></DIV>
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<DIV><FONT face=Arial>I don't have all the answers as to how to handle the cooling in the widebodies. Nat</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=cjm767driver@hotmail.com href="mailto:cjm767driver@hotmail.com">chris moon</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=aabdu@sbcglobal.net href="mailto:aabdu@sbcglobal.net">aabdu@sbcglobal.net</A> ; <A title=nsrca-discussion@lists.nsrca.org href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, September 08, 2008 1:06 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Electric pattern recommended equipment</DIV>
<DIV><BR></DIV>Anthony.<BR>Your question is exactly why I started the web site. There is no single <BR>place to find the large amount of data that exists on battery and motor <BR>longevity and performance. Everyone has their personal data and <BR>experiences but unless you contact everyone flying electrics, you won't <BR>be able to get a large enough sample of data to draw valid conclusions. <BR>As far as batteries, I think you will find answers all over the board. <BR>I know of some who have only had good performance from a set of <BR>batteries for 20-30 cycles and others who have 200+ cycles on the same <BR>type of batteries. What I am trying to do is see if the 20-30 cycles is <BR>the norm, or is the 200 correct, or is the average somewhere in the <BR>middle. Only a large enough sample will tell, and hopefully that will <BR>happen. I know that many/most/ of the really low cycle life packs were <BR>caused by mfg defects and were subsequently replaced by the mfg. <BR>As far as the Flight Power F3A packs, the consensus is that they are <BR>really strong for maybe 50 flights, then degrade quickly and the average <BR>cycle life is probably 100 or less. I consider a pack run out if it <BR>can't provide adequate power for normal contest flight. Not completely <BR>dead, just too weak for a contest flight. For example, my Flight Power <BR>F3A pack has 110 cycles and I consider it too weak now for a contest <BR>flight. On the other hand, I have 2 sets of TP 5300 ProLites with 150+ <BR>cycles each and fly them regularly with good performance still.<BR>Remember that the user has ultimate control over how well things work <BR>over time. We can all list people who could never get glow motor XYZ to <BR>run well while others have stellar performance over a long period of <BR>time. Same for electrics. Everyone will agree that there is a definite <BR>learning curve to electrics and the best way to ensure success at first <BR>is to copy a setup and charging regimen that has been used by others <BR>with success over time. <BR><BR>Chris<BR><BR><BR>Anthony Abdullah wrote:<BR>> I was looking at the site and noticed how quickly / few cycles it takes for lipo performance to start to degrade (20-30 cycles in some cases). Is the "premature" degradation on the site just a function of a small sample or does performance on average start to decrease in as few cycles?<BR>><BR>> What is the average number of cycles others are seeing with F3A lipo packs before they start to lose capacity? <BR>><BR>><BR>> --- On Sun, 9/7/08, JEREMY CHINN wrote:<BR>><BR>> <BR>>> From: JEREMY CHINN <BR>>> Subject: Re: [NSRCA-discussion] Electric pattern recommended equipment<BR>>> To: "General pattern discussion" <BR>>> Date: Sunday, September 7, 2008, 6:55 PM<BR>>> Chris Moon took the time to put up the new site <BR>>> <BR>>> http://www.electric-f3a.com/<BR>>> <BR>>> Lots of great information to be had there.> Date: Sun,<BR>>> 7 Sep 2008 17:30:52 -0500> From:<BR>>> glmiller3@suddenlink.net> To: aabdu@sbcglobal.net;<BR>>> nsrca-discussion@lists.nsrca.org> Subject: Re:<BR>>> [NSRCA-discussion] Electric pattern recommended<BR>>> equipment>> Anthony,>> I've used the Axi<BR>>> 5330 F3A and the Dualsky 11T with very good results from<BR>>> both. I think the AXI is a little stronger, but both are<BR>>> plenty powerful. I usually run them with a 20X15 APC prop.<BR>>> The CC85 and Jeti 99 spin controllers are both very good and<BR>>> reliable. I prefer the Spin's myself, but I've used<BR>>> both.>> For batteries, I prefer the Flightpower 5350<BR>>> F3A packs....these have more capacity for their weight than<BR>>> the higher discharge capacity packs - You don't need the<BR>>> "C" rating, you need the "mah" rating-<BR>>> my perspective anyway. The True battery 5000 ma packs are OK<BR>>> for practice, but their availablity is spotty and they seem<BR>>> to have differing dimensions between different<BR>>> "lots".>> There is a new website the has<BR>>> been started to collate various electric combo's--<BR>>> I'm sure someone here will give the url shortly.><BR>>> <BR>>>> G> ---- Anthony Abdullah <BR>>>> <BR>>> wrote:>> =============> Hello everyone,> I<BR>>> have decided that my next pattern plane / build will be<BR>>> electric and I am doing my preliminary research before<BR>>> starting to buy equipment (motor, ESC, batteries, prop,<BR>>> E-motor mount) and could really use some help.>> My<BR>>> goal for my first foray into electrics is to put together<BR>>> proven reliable equipment that works and performs well as<BR>>> complimentary components. I don't know as much about<BR>>> electrics as I will need to, but I am sure that I will be<BR>>> learning a lot as I go along. My expectations are that I<BR>>> will be using a Lipo 10S pack of at least 5000 mah (will<BR>>> this be enough?). I have often seen that people use the<BR>>> Hacker C50 motors but also see a lot of other engines by<BR>>> other manufacturers.>> Requirements:> 1. I do not<BR>>> want to use a gear box so I will need a motor capable of<BR>>> direct drive> 2. I want equipment where the components<BR>>> will all work well together> 3. weight is always an<BR>>> issue> 4. price is a consideration but third behind<BR>>> reliability and performance>> I will be flying<BR>>> advanced with the new airplane which will be purpose built<BR>>> as an electric. If there is a website or other source of<BR>>> useful information on electrics, I would like that as well.<BR>>> <BR>>>>> Thanks in advance> Anthony>><BR>>>>> <BR>>> _______________________________________________><BR>>> NSRCA-discussion mailing list><BR>>> NSRCA-discussion@lists.nsrca.org><BR>>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion><BR>>> <BR>>>> _______________________________________________><BR>>>> <BR>>> NSRCA-discussion mailing list><BR>>> NSRCA-discussion@lists.nsrca.org><BR>>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR>>> _________________________________________________________________<BR>>> Get more out of the Web. Learn 10 hidden secrets of Windows<BR>>> Live.<BR>>> http://windowslive.com/connect/post/jamiethomson.spaces.live.com-Blog-cns!550F681DAD532637!5295.entry?ocid=TXT_TAGLM_WL_domore_092008_______________________________________________<BR>>> NSRCA-discussion mailing list<BR>>> NSRCA-discussion@lists.nsrca.org<BR>>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR>>> <BR>> _______________________________________________<BR>> NSRCA-discussion mailing list<BR>> NSRCA-discussion@lists.nsrca.org<BR>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR>><BR>><BR>> <BR><BR><BR>
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