[NSRCA-discussion] 15C vs 20C Flightmax batteries

Tue Aug 10 16:21:40 AKDT 2010

Ron,

   As an engineer, how do you define "authority" . . .

On Tue, Aug 10, 2010 at 7:07 PM, Ron Van Putte <vanputte at cox.net> wrote:

> Picturum la solo digit.
>
> To debunk the previous e-mail's pejorative comments, I actually have a data
> set to report.  I am flying a 9 lb, 31 3/4 oz Genesis and am using the
> lighter Flightmax 15C 5S-4400 mah packs so my airplane will make weight.  I
> am an engineer, but am not so anal as to record all their weights and
> charge/discharge cycles (who would do that?), but can report that the 4400's
> have enough power at the end of the Master class maneuver sequence to pull
> the 1/2 Square Loop w/ Two 1/2 Rolls Up with authority.
>
> Ron
>
> On Aug 10, 2010, at 6:54 PM, Atwood, Mark wrote:
>
>  It's just hard for Ron to write anything long since he has to translate
>> from his native Latin.
>>
>> Sent from my Verizon Wireless Phone
>>
>> ----- Reply message -----
>> From: "Ron Van Putte" <vanputte at cox.net>
>> Date: Tue, Aug 10, 2010 7:36 pm
>> Subject: [NSRCA-discussion] 15C vs 20C Flightmax batteries
>> To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
>>
>> Yes.  Nobody can match Mark's pithy comments.
>>
>> Ron VP
>>
>>
>>
>> On Aug 10, 2010, at 6:21 PM, colin chariandy wrote:
>>
>>  with all the e users out there is mark the only one who can give
>>> some feedback  on this?
>>>
>>> colin
>>>
>>> ----------
>>> Sent via Rogers MobileMail
>>>
>>> ------Original Message------
>>> From: Atwood, Mark <atwoodm at paragon-inc.com>
>>> To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
>>> Date: Tuesday, August 10, 2010 4:01:17 PM GMT-0400
>>> Subject: Re: [NSRCA-discussion] 15C vs 20C Flightmax batteries
>>>
>>> I've been running both and would encourage you to get the 20C, or
>>> even the 25C if you can handle the weight.
>>>
>>> 15C - typically run between 1180-1205gms for a pair (with connector
>>> and Velcro, etc).  Power is good, but NOT if they're cold, or even
>>> cool.  I have 50 flights on 4 different sets and I would argue that
>>> most are on their last legs.  They still fly the P schedule fairly
>>> strong, but F is a stretch, and they are getting hot and puffy now.
>>>
>>> 20C - I have 2 sets and 1 is 1210gms and the other is 1245.  BIG
>>> variance.  But they seem to handle the load better.  One is still
>>> getting hot/puffy though with only 30+ flights on it.    THIS btw,
>>> is the main issue I think with the zippy packs.  Inconsistency.
>>> Some are great, some are fair, some suck.   You get a little of
>>> what you pay for.  I'd say there's about an 85% hit ratio with the
>>> flightmax packs, meaning that you should expect about 1 in 5 to be
>>> pretty poor.  Still a good value though.
>>>
>>> 25C - these are heavy...about 1300gms per set, but they've been
>>> running very strong, very cool, and staying rock solid (no
>>> puffiness yet) with about 30+ flights on 3 sets.   They still have
>>> the issue of not delivering great power when they're cool.  At the
>>> nats we noticed that the Zippy's seem to be more temperature
>>> sensitive than the TP batteries.  The TP were down a little when
>>> they were cold, but the zippy's were down a LOT.  When they were
>>> warm, they held their own with the TP batteries.  Not sure what the
>>> reason for the variance is though.
>>>
>>> This was my first year flying E, so that's really all I have to
>>> offer.  For reference, I was running  a Hacker 14XL with a 21x14
>>> prop flying 7.5min flights (fairly strict about that).
>>>
>>> -Mark
>>>
>>> Mark Atwood
>>> Paragon Consulting, Inc.  |  President
>>> 5885 Landerbrook Drive Suite 130, Cleveland Ohio, 44124
>>> Phone: 440.684.3101 x102  |  Fax: 440.684.3102
>>> mark.atwood at paragon-inc.com<mailto:mark.atwood at paragon-inc.com>  |
>>> www.paragon-inc.com<http://www.paragon-inc.com/<
>>> http://www.paragon-inc.com<http://www.paragon-inc.com/>>
>>>
>>> From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-
>>> discussion-bounces at lists.nsrca.org] On Behalf Of colin chariandy
>>> Sent: Tuesday, August 10, 2010 3:14 PM
>>> To: NSRCA Mailing List
>>> Subject: [NSRCA-discussion] 15C vs 20C Flightmax batteries
>>>
>>> I noticed that most are running the 15C 5000 packs but these seem
>>> to be in stock infrequently. Can anyone comment on the performace
>>> of the 20C 5000s from Flightmax.
>>>
>>> What's the weight, performance and longevity compared to the 15Cs.
>>>
>>> I know there must be reasons that the 15Cs are more popular....just
>>> not sure what they are. I would have though the 20Cs would be
>>> better as someone reported that they are only 10gms more than the
>>> 15Cs and would provide a bit more power. Additionally I noticed the
>>> TPs are 20C...not 15C.
>>>
>>> I'm new to the e-scene...so please ignore the ignorance.
>>>
>>> Colin.
>>>
>>>
>>>
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>>
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-- 

Keith Hoard
Collierville, TN
khoard at gmail.com
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