[NSRCA-discussion] Electric pattern recommended equipment

Mon Sep 8 17:06:56 AKDT 2008

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..... 
Of course it is an 'anti-widebody' design..... : )

From: natpenton at centurytel.netTo: nsrca-discussion at lists.nsrca.orgDate: Mon, 8 Sep 2008 17:08:25 -0500Subject: Re: [NSRCA-discussion] Electric pattern recommended equipment

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.

I don't have all the answers as to how to handle the cooling in the widebodies.    Nat

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

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