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

[verne at twmi.rr.com]

The latest 20C packs shown on Hobby City are heavier yet, though out of stock. I don't remember the actual weight, but I think it was in the 640g range which is too heavy for me.

Verne


---- Ed White <edvwhite at yahoo.com> wrote: 

=============
I flew the 15C's last year (about 60 flights per pack) and am still flying them 
this year. This year I added two 20C packs to the mix. I've got perhaps 25 
flights each on the 20C's.  Can't see a lot of difference between them in 
flight.  The older 15C IR's (with probably 80+ flights on each) are in the 4-5 
mohm range.  The newer 20C's are in the 2-3 mohm range.  I expect that the 
lighter weight of the 15C's compensates for their higher IR's.  The current 
20C's are not just 10 grams heavier than the 15C's.  Verne's numbers (587 vs 622 
grams) are right on the money.  This is all on FAI P11 at about 65 amps max. 


For me the choice comes down to weight.  The lighter weight seems a bit better 
trade off (in P11).  In Masters, or if I were pulling 75 amps, I would probably 
go for the 20C's in the hope of better longevity.  Though since I haven't yet 
even thought about retiring the 15C's, I really don't have a longevity 
comparison.

Ed




________________________________
From: colin chariandy <cchariandy at yahoo.ca>
To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
Sent: Tue, August 10, 2010 2:14:17 PM
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.