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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><FONT face=Arial></FONT> </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>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<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
<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>>> 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
<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>>>
_______________________________________________><BR>>>
NSRCA-discussion mailing list><BR>>>
NSRCA-discussion@lists.nsrca.org><BR>>>
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion><BR>>>
<BR>>>>
_______________________________________________><BR>>>>
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NSRCA-discussion@lists.nsrca.org><BR>>>
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR>>>
_________________________________________________________________<BR>>>
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