Battery question

RC Steve Sterling rcsteve at tcrcm.org
Thu Jul 31 18:30:36 AKDT 2003


The voltwatch is very fast at capturing and displaying short-lasting voltage
drops. This is suggesting a lot of voltage drop across power switch, power
wires or power connectors. I had the same thing happening in an Ultimate
bipe. Changed out the cheap power switch harness for a high quality setup
and it stopped. Also could be a high resistance connection in the
between-cell battery jumpers or a bad cell.


-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of Joe Dunnaway
Sent: Thursday, July 31, 2003 8:50 AM
To: discussion at nsrca.org
Subject: Re: Battery question


Hi Terry,
 I put one of those cheap Hobbico "VoltWatch" LED displays in my plane.  I
have 4 digital servos and during the 3rd flight, the display will show in
the green with the engine off but is bumping the red with the engine
running. I'm running a 1600 mah 4 cell Nihm pack. It's amaziing how much
current these digital servos are drawing just to stay centered with the
motor is running.

Joe Dunnaway

.

----- Original Message -----
From: "Terry Terrenoire" <amad2terry at juno.com>
To: <discussion at nsrca.org>
Sent: Thursday, July 31, 2003 9:47 AM
Subject: Re: Battery question


> That is the "technical" info I was looking for.
> Seems that 3 flights is very safe and will provide a reserve. I can
> recharge to fulll capacity with my Super Nova in 2 hours.
>
> Terry T.
>
> On Thu, 31 Jul 2003 09:09:12 -0500 VicenteRC <vicenterc at comcast.net>
> writes:
> > Hi Terry:
> >
> > I use the same pack and I can fly 4-5 times (2 Advance Schedules
> > each
> > fly) and never had a problem.  The rule of thumb is not to go far
> > below
> > 1/2 of the pack capacity.  In this case we don't want to use a lot
> > more
> > than 550 mah.
> >
> > Regards,
> >
> > Vicente Bortone
> >
> >
> >
> > ----- Original Message -----
> > From: Terry Terrenoire <amad2terry at juno.com>
> > Date: Thursday, July 31, 2003 5:22 am
> > Subject: Battery question
> >
> > > Just flying my first ship with 4 digital servos. Power is supplied
> >
> > > by a
> > > standard Nicad, 1100 mah, battery.
> > > After 3 flights the other day it took 361ma to refill it
> > > How mych reserve did I have ?
> > > Used an average of 120 ma per flight.
> > > How many flights can I SAFELY get on that 1100 mah pack?
> > >
> > > Terry T.
> > > =====================================
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