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<DIV><FONT face=Arial>My 2 cents....not an arguement by any means, just another
angle.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>The problem with lipos is exactly what you mentioned. With
a twist.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>They simply introduced them to market without enough
research and development for our specific application. you mention proper
equipment, but back then there really wasn't any proper equipment. And until you
see the results of what those things CAN do, a normal average guy can easily get
lazy and careless. Well guess what happened?</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Back then there was no real balancing. no good chargers
capable of properly keeping the packs happy without a LOT of user experience and
research on his own.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I'm talking about the first year or so that Li-ions and
lipos were really brought to our market. This is the time where most of the
horror stories are based. I was semi-involved in one, but I can tell you with a
fair bit of certainty that it was not user error. it was simply in my opinion,
and in a lot of others, a bad design coupled with possibly shoddy
manufacturing.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>However...nowadays? Pffffft. take a few simple
precautions, know what you're doing, the info is out there and the equipment to
support it. just like spinning props, gasoline, nicads, you name it. Safety
technology like FAA regs (which I'm sure you know all too well LOL) are written
in blood. Yep there have been fires, lots. But in general nowadays if you hear
about something like that, it was probably user error. In the beginning, it was
a whole different kettle of fish. </FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>heck I have lithiums in everything I own except my starter
for my YS. And that will probably change this year! They are as safe as anything
else now because we now have the proper equipment and safety precautions to make
it that way. if they had waited one more year, this might be a non
issue.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>-Mike</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=chad@f3acanada.org
href="mailto:chad@f3acanada.org">chad@f3acanada.org</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> Thursday, April 10, 2008 11:54
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Lipo
Sacks</DIV>
<DIV><BR></DIV><SPAN text="#000000" bgcolor="#ffffff">Walter, <BR>I'm with
Chad on this. <BR>The key is to have good equipment that will monitor
the batteries and automatically shut down if there is a problem. Too
many sensational stories on the internet about some battery fire etc have a
lot of unknowns in their stories. Have you ever seen one where they said
"it was my fault, I did XYZ that I should not have done"? No,
everyone says, wow it just blew up - then the marketing guys come out with a
safety product to fix a problem that probably never would exist with good
equipment and charging techniques. Why don't we have bunkers and sacks
for cans of gasoline? Is there not a chance that it could explode
too? We know that if we goof around carelessly with gasoline, it will go
boom - so we are careful. Same with lipos.<BR>I could be wrong here, but
I too have hundreds of charges on big lipos and have never had any issue. The
key is just be careful and check your charge settings and use good equipment
with safety cut offs. Can it hurt to use these bunkers and sacks, of
course not. They give you another layer of protection but I really don't
think they are that necessary.<BR>Sorry, but I really think the hype is over
done with lipos.<BR><BR>Chris<BR><BR>PS - no more coffee for me today - I
better go fly and relax some<BR><BR><BR>Chad Northeast wrote:
<BLOCKQUOTE cite=mid:d0fde1d9302a9.47fddb1e@shaw.ca
type="cite">Walter<BR><BR>The only safe way to charge lipos is to ensure you
have a safe charger that monitors cell voltages like the TP 1010, or the
Schulze's. Or use a balancer like the Flightpower etc that tie into
the charge line. This way if anything goes screwy with the charge they
shut it down, lipos don't light on fire for no reason, its usually because
you overcharged them and they got hot and burst. Or you are charging a
damaged pack, and usually common sense will tell you that is not a good
idea.<BR><BR>ALWAYS babysit the charge, forget bunkers, sacks etc. if you
monitor the charge there is no need for these because you will always be
aware of the state of the packs as they are charging. In my opinion
using sacks etc. is a band aid for unsafe charging practices. I am
sure someone will flame me for this but I have been charging these big packs
for 4 years, I must have 1000's of charges behind me and "touch wood" I have
never had a single issue, but I watch my chargers. In the early days
before we had all this fancy monitoring stuff I had to pull packs off
chargers because things were going bad.<BR><BR>Chad<BR><BR>----- Original
Message -----<BR>From: Walter Nasse <A class=moz-txt-link-rfc2396E
href="mailto:wwnasse@figment.ca"><wwnasse@figment.ca></A><BR>Date:
Wednesday, April 9, 2008 9:09 pm<BR>Subject: [NSRCA-discussion] Lipo
Sacks<BR>To: NSRCA Mailing List <A class=moz-txt-link-rfc2396E
href="mailto:nsrca-discussion@lists.nsrca.org"><nsrca-discussion@lists.nsrca.org></A><BR><BR>>
BlankDoes anyone use the Lipo Sack for charging and transporting <BR>>
batterypacks?<BR>> <BR>> What other alternatives are there? Ammo
Boxes? Flour Tins?<BR>> <BR>> Thanks,<BR>> <BR>> Walter<BR>>
<BR>> No virus found in this outgoing message.<BR>> Checked by
AVG.<BR>> Version: 7.5.519 / Virus Database: 269.22.10/1367 - Release
<BR>> Date: 4/9/2008<BR>> 7:10 AM<BR>> <PRE wrap=""><HR width="90%" SIZE=4>
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