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<DIV><FONT face=Arial>Rich:</FONT></DIV>
<DIV><FONT face=Arial>I don't necessarily distrust LiPo or Li Ion any less than
a NiCad or NiMh pack. If anything, my experience to date shows them to be
very reliable (100% so far). I really like the way perform as they age as
contrasted with NiMH in particular and the virtually zero self discharge is a
very convenient thing too. Having said all that, I use a dual batteries
and regulators because anything can happen, so why not take out a cheap
insurance policy to save your airplane in the event of a failure? As it
turns out, you can get more capacity, more current on demand and lighter weight
with a pair of LiPo's and dual regulators than a 5 cell NiMh solution, and you
get the same exact output (same servo speed & torque) all day long.
I've run a lot of NiMh dual setups unregulated no big IMAC stuff in the past and
you definitely feel the degraded performance as the batteries discharge
throughout the day.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Regards</FONT></DIV>
<DIV><FONT face=Arial>Ed</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV>----- Original Message ----- </DIV>
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<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=pamrich47@hotmail.com href="mailto:pamrich47@hotmail.com">Richard
Strickland</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">General pattern discussion</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, February 14, 2009 1:37
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Receiver
packs</DIV>
<DIV><BR></DIV>Jerry--just a couple thoughts: I will probably never use
a battery for a receiver/flight pack again that I haven't been in charge
of its history. If you've been paying attention to its characteristics
since new, we can generally tell when they start to lose capacity--and for me,
there was a point on the ESV when it got there, I got a little nervous
about going up 'one more time'. When it would approach that point
after about five flights, then I would figure it was 1. if early in its
career--then to cycle and 2. if in to the second or third year(sometimes
longer) it was time to retire it. Nicads for me have been pretty
reliable that way and I've been comfortable running one pack. You can
still go to five cells in nicads for additional capacity and power with a
regulator and still have that reliability. I think most of the guys that
have gone to lipos can enjoy the increased capacity and power along with an
increased discharge rate in a smaller, lighter package. But I don't get
the impression that they trust them like nicads. Probably the best
thing to do is monitor your batteries of any type with a good, loaded ESV to
keep an eye out for any unusual battery behavior. The two battery
debate is a little like the single versus twin debate in full scale
airplanes--some guys think twins just have double the chances to fail.<BR>All
that said, I understand some of the new receivers are a little touchy
regarding low voltage situations. I had an older receiver in an airplane
that I bought used with a 'new' battery--turned out the battery was bad--but
got a warning(hold) and was able to land--but showed NO volts afterward.
<BR>Chances are with the newer stuff, it may not have made it back on the
ground in one piece. So using a 5 cell nicad or 2 cell lipo with
regulator may not be a bad idea and monitor with a good loaded
ESV.<BR>FWIW<BR>Richard<BR> <BR>
<HR id=stopSpelling>
From: jjvoth@mtelco.net<BR>To: nsrca-discussion@lists.nsrca.org<BR>Date: Fri,
13 Feb 2009 20:32:46 -0600<BR>Subject: Re: [NSRCA-discussion] Receiver
packs<BR><BR>
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<DIV><FONT face=Arial size=2>Thanks for the info guys</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=vicenterc@comcast.net href="mailto:vicenterc@comcast.net">Vicente
"Vince" Bortone</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">General pattern
discussion</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, February 13, 2009 8:28
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion]
Receiver packs</DIV>
<DIV><BR></DIV>
<DIV style="FONT-SIZE: 12pt; COLOR: #000000; FONT-FAMILY: Arial">Hi
Jerry,<BR> <BR>I have been using two li-po using the
tech-aero double regulator <A
href="http://www.tech-aero.net/plr5-dr2.htm">http://www.tech-aero.net/plr5-dr2.htm</A>
The capacity I am using now is 930 mah, 2 cells
batteries. I know that I can fly at least 6-8 times. After
that, I am brain dead.<BR> <BR>VB<BR> <BR><BR>----- Original
Message -----<BR>From: "Richard Strickland" <<A
href="mailto:pamrich47@hotmail.com">pamrich47@hotmail.com</A>><BR>To:
"General pattern discussion"
<nsrca-discussion@lists.nsrca.org><BR>Sent: Friday, February 13, 2009
8:01:03 PM GMT -06:00 US/Canada Central<BR>Subject: Re: [NSRCA-discussion]
Receiver packs<BR><BR>
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Jerry, I think the short answer is no. But there has been much
discussion regarding dual packs for back-up. An example ot single pack
usage is using a 2 cell lipo at around 780-800ma for practice and 340-380ma
for contests to make weight. These are used with voltage regulators
with variing outputs.<BR>RS<BR> <BR>> From:
jjvoth@mtelco.net<BR>> To: nsrca-discussion@lists.nsrca.org<BR>> Date:
Fri, 13 Feb 2009 17:32:25 -0600<BR>> Subject: Re: [NSRCA-discussion]
Receiver packs<BR>> <BR>> Sorry, I said that wrong. I meant are two
packs needed to power the flight <BR>> pack.<BR>> ----- Original
Message ----- <BR>> From: "Jerry Voth" <jjvoth@mtelco.net><BR>>
To: "NSRCA" <nsrca-discussion@lists.nsrca.org><BR>> Sent: Friday,
February 13, 2009 5:23 PM<BR>> Subject: [NSRCA-discussion] Receiver
packs<BR>> <BR>> <BR>> > This has probably come up many times
but I'd like to know if it's <BR>> > necessary<BR>> > to use two
Li-Fe packs for the radio and servos<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>>
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