any merit in running dual battery packs ?

[Wladimir Kummer de Paula]

I wouldn´t go that way. The shorted bad pack could effectively draw 
enough current to make your airborne eletronics go crazy.

ronlock at comcast.net escreveu:

> I wanted redundancy in the power system for my pattern birds, but 
> without ANY new potential points of failure.   My confinguration is:
> Two 700mah 5 cell batt packs.    Each pack direct to a switch, direct 
> to Receiver.
> No regulators, diodes, etc.  
> I'm more concerned about connector, switch, and solder joint failures 
> in the pack, than failure of a battery cell.  This config gives me 
> redundancy in those areas.
> When things go normally, I have 1400mah available with only a slight 
> weight gain over a single larger pack, switch & wiring.
>  
> I understand cells more often fail open, than short.   But in case of 
> a short, (the worst case for this config) the good pack must fly the 
> plane, and charge the "bad" pack for duration of the flight.  After 
> research & discussion with others, it's my belief the good pack will 
> tolerate the load of charging the bad one (which won't be at a very 
> high rate) and finishing a flight. 
>  
> A potential failure point is me.  (darn humans!)  My duties as crew 
> chief include checking both batts before every flight, and turning on 
> both before flight.
>  


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