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

[Ron Van Putte]

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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