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

[Atwood, Mark]

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/>

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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