[NSRCA-discussion] Electrics

[Richard Strickland]

Hi Nat,

We pumped them right back up—my point was—and I don’t remember the
formula—there isn’t as much capacity in them as you think.  The big lipos
draw more than you think as it relates to LA batt. capacity.

Happy Easter to all


Richard

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Nat Penton
Sent: Friday, April 14, 2006 3:21 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Electrics

Richard, I think my lack of respect (ignorance of lead acid good practice)
was the major cause of the short life. I would make up to three flights and
not recharge because I wanted to see how many flights was possible before
charging. Sometimes that was days, sometimes a week or more.
----- Original Message -----
From: Richard Strickland <mailto:richard.s at allied-callaway.com>
To: 'NSRCA Mailing List' <mailto:nsrca-discussion at lists.nsrca.org>
Sent: Friday, April 14, 2006 3:00 PM
Subject: Re: [NSRCA-discussion] Electrics

After the first couple cycles, I was only getting 2.5-3 charges on
Interstate's largest deep-discharge units.  We did the math and that was
about right.  They have 'Economy' batteries that are units that have been
turned back in, a little old, etc that they sell for very little.  I got a
basically new one to add to the old and get enough charges for what I need.
Thought about a Honda generator-but with the new chargers-you have to go up
a notch or two for charging capacity.  It's always something.

I finally got off my butt to fix the Impact the tunnel-vision-challenged guy
ran into on the runway last year and screwed up the right wing and fuse.
Looks like it gained about 3.5 oz. total. It was a smidge over 11 lbs with
the 3200s b/4 the crash-what a disappointment--and now it's just going to
be...... well, not my number 1 for sure.  I thought about asking him about
insurance, but since the thing was going to be way over with better
batteries, I just chalked it up...

RS

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Nat Penton
Sent: Friday, April 14, 2006 2:09 PM
To: NSRCA Mailing List
Subject: [NSRCA-discussion] Electrics

The only battery giving me a problem is the lead acid Marine 'deep
discharge'  battery used for field charging of the lipos. It has lost about
70% of it's capacity in seven months.

It provided six 12min flts when new and was purchased from Academy Surplus
for $40. It has provided a total of maybe 80 flights ( 30 cycles ??? ). The
problem is likely due to my maintenance ( lack thereof ). I left the battery
in a partial discharge state sometmes for weeks. You can find maintenance
needs on Google at agmbatteries, courtesy Earl Haury.

West Mountain sells a gell cell, 54#, 84ah, rated for 500 cycles @ 100%
discharge ( 20hr discharge rate ), $149 del. I will see how it performs
under our conditions.
                                                      Nat
  _____

_______________________________________________
NSRCA-discussion mailing list
NSRCA-discussion at lists.nsrca.org
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
  _____

No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.1.385 / Virus Database: 268.4.1/310 - Release Date: 4/12/2006
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20060414/8afa8297/attachment.html