I've found (on transmitter packs) that the Sirius gives up at around 60% of charge, and that to get a full pack, I have to resort to a timed charge. NOT what I want to deal with when plugging in a "set it and forget it" charger.
As for 40%, I do the same, with twin 1700 nicad packs. I'll actually throw the ship on charge every 4 flights or so, when I'm taking a break.
Matt
-----Original Message-----
From: Bill Malvey [mailto:[EMAIL PROTECTED]]
Sent: Monday, November 08, 2004 5:29 PM
To: [EMAIL PROTECTED]
Subject: Re: [RCSE] Battery food
On 11/8/04 13:35 Lydon, Matthew (NBC Universal) wrote:
> I won't use NImH in an airborn pack at all.
And I wouldn't use anything else, and haven't for several years. That
includes everything from hand launch to 40% aerobatic planes with 150cc
engines on them.
I have found that fast charging is not an issue. NiMH's handle a 1C charge
very nicely, provided you are using a good charger like the Sirius.
I charge on the way to the field and if I think that I am going to fly the
packs flat, well then I just put them on charge between flights.
My TD planes with 6 digitals (JR DS368) consume an average of 5 mAh of
capacity for every minute of flight. That is an average load of 300 mA. A
2,100 mAh Nimh will last me for 5 hours with a healthy (25%) reserve. If I'm
spending more than 5 hours per day in the air I'm flying a bunch. If I even
get close to that, I pop the packs on charge between flights and I am good
to go whenever.
My 40% aerobatic plane with 10 JR8611 digitals has an average load of 2
amps. Two 2700 NiMH (5.4 amp-hour total) give me just over 2 hours of on
time. That's about 8 flights. Way more than I do in an average session. If I
want to fly more than that I simply pop the packs on my Sirius Quad charger
to top off between flights. Easy stuff.
~~~~~~~~~~~~~~~
Bill Malvey
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