Hi Jim,
The most important specification to consider is the cell impedence. You
might be surprised to discover that cell (larger) surface area in those
bigger NiMH cells still does not make up for lower impedence within an
even smaller NiCD cell.
Add a larger (similar) NiCD cell "and" the lower impendence it offers
and you can actually measure the available voltage difference at the
servo when it is really needed...
Jim Laurel wrote:
True enough, Simon. But if you use large enough NiMh cells, there is
more than enough ability to deliver the kinds of currents we need. I
have always thought it was silly to see people using 4-cell AA or even
AAA NiMh packs in big TD ships, then adding lead to balance. I always
try to get as close as possible to the CG I want using batteries rather
than lead. In the Pike Superior, for example, I use 4-cell packs of
GP2200. WIth a JR R770 up front and maybe ~3/4 to 1 oz of lead taped
to the side of the pack, you are usually right on the CG. There is no
current draw issue with those GP2200 cells! ;-)
--Jim
On Mar 8, 2006, at 5:40 PM, Simon Van Leeuwen wrote:
In a TX, NiMH offers superior performance given the relatively low
current consumption. On the other hand, NiMH is inferior on the RX
side when current demands are high when compared to NiCD.
Arne Ansper wrote:
Hi!
Must get new battery for TX. Current one is down to 500mAh (from
750mAh) and lasts only for 2.5 hours. I can get 1100 mAh NiCd or
1650 mAh NiMH (both Sanyo) at the same price. Which one is better
for TX?
Arne
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Cogito Ergo Zooom
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Cogito Ergo Zooom
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