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

Tue Aug 10 16:28:12 AKDT 2010

If you hear me saying, "Come on baby!", the maneuver isn't being done  
with authority.

Ron

On Aug 10, 2010, at 7:21 PM, Keith Hoard wrote:

> 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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>
>
> -- 
>
> Keith Hoard
> Collierville, TN
> khoard at gmail.com
>
>
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