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I do not think it is that simple. I have had less than good luck with
a few different battery brands. My last ones ran quite cool when new.
just warm after a full 8 minute masters flight in the heat of the
summer. Unfortunately after under 15 cycles they stopped performing as
well. Power was down, full throttle was needed over more of the
flight and the packs were now much hotter even with the outside
temperature 10 degrees lower. I think battery temperature has a lot
more to do with the condition of the pack. Internal resistance?<br>
<br>
Stuart C.<br>
<br>
Nat Penton wrote:
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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>
<div> </div>
<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-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">-----
Original Message ----- </div>
<div
style="background: rgb(228, 228, 228) none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>From:</b>
<a moz-do-not-send="true" title="cjm767driver@hotmail.com"
href="mailto:cjm767driver@hotmail.com">chris moon</a> </div>
<div
style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>To:</b>
<a moz-do-not-send="true" title="aabdu@sbcglobal.net"
href="mailto:aabdu@sbcglobal.net">aabdu@sbcglobal.net</a> ; <a
moz-do-not-send="true" title="nsrca-discussion@lists.nsrca.org"
href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</a>
</div>
<div
style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>Sent:</b>
Monday, September 08, 2008 1:06 PM</div>
<div
style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><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 <LAGRUE@HOTMAIL.COM>wrote:<br>
><br>
> <br>
>> From: JEREMY CHINN <LAGRUE@HOTMAIL.COM><br>
>> Subject: Re: [NSRCA-discussion] Electric pattern recommended
equipment<br>
>> To: "General pattern discussion" <NSRCA-DISCUSSION@LISTS.NSRCA.ORG><br>
>> Date: Sunday, September 7, 2008, 6:55 PM<br>
>> Chris Moon took the time to put up the new site <br>
>> <br>
>> <a class="moz-txt-link-freetext" href="http://www.electric-f3a.com/">http://www.electric-f3a.com/</a><br>
>> <br>
>> Lots of great information to be had there.> Date: Sun,<br>
>> 7 Sep 2008 17:30:52 -0500> From:<br>
>> <a class="moz-txt-link-abbreviated" href="mailto:glmiller3@suddenlink.net">glmiller3@suddenlink.net</a>> To: <a class="moz-txt-link-abbreviated" href="mailto:aabdu@sbcglobal.net">aabdu@sbcglobal.net</a>;<br>
>> <a class="moz-txt-link-abbreviated" href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</a>> 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 <AABDU@SBCGLOBAL.NET><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>
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