Shop our Airplanes Products Drone Products Sales
Thread Tools
Jul 12, 2001, 08:39 AM
Registered User

High current performance, RC3000 NiCads?


Hi:
Anyone have any data/experience on how the RC3000 cells are working out with high current draws, in the 70 to 90 amp range? Considering making up a pack or two for my F5B plane, currently using RC2400.
Regards,
Bob Stewart
Sign up now
to remove ads between posts
Jul 12, 2001, 09:59 AM
Registered User
Bob,
Can't give any data on these cells,
did you try Steve Belnap at: www.flydma.com

?

Eric
Jul 12, 2001, 10:25 AM
Registered User
Ralph Weaver's Avatar
Quote:
Originally posted by BobStewart:
Hi:
Anyone have any data/experience on how the RC3000 cells are working out with high current draws, in the 70 to 90 amp range? Considering making up a pack or two for my F5B plane, currently using RC2400.
Regards,
Bob Stewart
Hi Bob,

I can't imagine that the NiMH's would work at those current levels. I use some Saft 3000s at about 50A, but only for short bursts, maybe 15 sec and they are OK. The Panasonic and Sanyo cells are better than the Safts. Sanyos have a little more voltage and Panasonics have more capacity. I'm about the test zapped Panasonic 3000's - should give more capacity at the same voltage as Sanyos for less money.

See http://www.magtechinc.net/Cells.htm for discharge graphs of the NiMH 3000's at 20 and 30A.
Jul 13, 2001, 08:55 AM
Registered User
I have no practical experience with these cells but the UK Mags have conducted some tests and it seems around 30A is ok but you won't get much more.

BTW how did you get on with your matched and zapped cells - did they prove to be better than the standards?
Jul 13, 2001, 01:40 PM
Registered User
ScottS's Avatar
Quote:
Originally posted by Petri Nygren:

Bob did not ask about NiMH:s. I would also be interested in Sanyo RC3000 _NiCad_ characteristics. Not everybody knows such things exist.

Are you sure? All Sanyo RC3000 I have seen are Nimh. Sanyo does make a 3000 industrial cell that is NiCd, but it is a full C cell and weighs ~3oz.
Jul 13, 2001, 01:54 PM
1.21 Gigawatts!
Steph280's Avatar
It's supposed to be a new high amp sub-C nicd soon to be released.

I rarely get a full 3000mah charge on my Sanyo 3000 Nimh, I wonder if these Nicds will be better.
Jul 13, 2001, 02:23 PM
Registered User
I would not use Sanyo NiMH cells or any other NIMH foam cell at anything over 40 amps. That's what I have seen testing cells. The foam electrode technology cannot hold up to high current and the cells will lose capacity. If you need really high current you need to stick to sentered NIMH cells or NICADS

thanks
Steve... http://sjslhill.hypermart.net
Jul 13, 2001, 03:03 PM
Registered User
ScotY's Avatar
Steve,
I sent you a message re. nimh cells for high current usage...which cells are you recommending and what is max. current?
Jul 13, 2001, 03:22 PM
Registered User
TEST RESULTS
Sanyo 3000 NIMH at 60Amps, vents and melts!!!
Sanyo 2200 NIMH at 60 Amps are great!!! and can be recharged 4 times a day after cool down, with a good peak charger (Astro). I now have 62 cycles on 1 of my sets and they are still out running 2400 Nicads.
They aren't nicknamed Green Meanies for nothing!
Jul 13, 2001, 04:57 PM
Registered User
2200's or 2400's as Jim say above.

thanks


Quote:
Originally posted by ScotY:
Steve,
I sent you a message re. nimh cells for high current usage...which cells are you recommending and what is max. current?
Jul 14, 2001, 12:58 AM
Senior Member
Quote:
Originally posted by Ralph Weaver:
[B] Hi Bob,

I can't imagine that the NiMH's would work at those current levels.

Bob did not ask about NiMH:s. I would also be interested in Sanyo RC3000 _NiCad_ characteristics. Not everybody knows such things exist.

Jul 14, 2001, 06:30 AM
Registered User
German pilot Ulf Herder uses pushed Sanyo 2200mah nimh in 10 cell F5B. He said they were a bit slower in the first climbs compared to the nicads but overall performance was superior because he said they kept a more constant current towards the end compared to the nicads.

/Erik
Jul 14, 2001, 07:44 AM
Registered User
Andy W's Avatar
PEOPLE! READ THE TOPIC:
"High current performance, RC3000 NiCads?"
..a
Jul 14, 2001, 08:34 AM
Dieselized User
gkamysz's Avatar
We are assuming that Bob made a mistake. Where have you seen RC3000 Nicad cells?

Greg
Jul 14, 2001, 09:45 AM
Ready for a Vacation!
AndrewK's Avatar
They make 3000 NiCds, they are bigger than RC2400's, take a look
http://www.flydma.com/batteries/index.html

There are 3000 CR NiCads at the bottom, but they are MUCH bigger than RC2400 cells.
Andrew


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion IB2000- High current performance? Ozprey Electric Plane Talk 3 May 14, 2006 05:55 AM
How to avoid high-current interference? swami Beginner Training Area (Aircraft-Electric) 8 Jul 25, 2001 04:07 PM
High current fuses/fuse holders Paul Electric Plane Talk 13 Jun 26, 2001 08:02 AM
High current sub C question. DavidWillis Power Systems 5 Jun 19, 2001 07:00 AM
Vendors for high current/capacity single cells? Paul Electric Plane Talk 2 Jun 06, 2001 11:02 PM