[NSRCA-discussion] Battery going bad?

[Peter Vogel]

Sounds like at least one cell is dropping significantly under high current
loads.

Peter+

On Mon, Sep 17, 2012 at 1:32 PM, Bob Kane <getterflash at yahoo.com> wrote:

> I had something happen Saturday that is new for me . . . .   I was going
> to put up a flight with my 62" Osiris for a club airshow, I advanced the
> throttle to take off, the plane accelerated, then the motor quit.  The
> Castle Controller was emitting two beeps, indicating a low voltage error.
>  One of the club members had a meter that measures individual cell
> voltages and everything looked OK.  I used another pack to put up a
> flight with no issues.
>
> When I got home I discharged the suspect pack and recharged it.  I flew it
> yesterday and it seemed to work OK.  I was practicing(!) some maneuvers repeatedly
> and the pack quit unexpectedly again, but it may have been my fault for not
> paying attention to the flight time.
>
> Is this a sign of pending failure?  The pack has maybe 30 cycles on it.  I
> have had other packs get puffy and weak but this pack is rock solid.   The
> pack is a Rhino 5S 5000mAH 25C pack.
>
> Bob Kane
> getterflash at yahoo.com
>
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>



-- 
Director, Fixed Wing Flight Training
Santa Clara County Model Aircraft Skypark
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