"Miracle switch" failures

[Chuck Czarnik]

I think that the IMAC list beat this one to death a couple of months
ago.  Several folks actually ran tests hooking 5 cell and 4 cell packs
to the same RX (the 4 cell used to simulate a 5 cell pack with 1 shorted
cell).  The results as I recall were that the shorted pack would draw a
modest amount of current from the good pack.  I don't remember specific
current draws, voltage drop, etc.  But the evidence from the testing
suggested that it was a safe practice, and the current draw from the bad
battery would not drain the good one inside the course of a single
flight.  FWIW, Chuck

-----Original Message-----
From: Gene Maurice [mailto:gene.maurice at attbi.com] 
Sent: Thursday, March 27, 2003 2:23 PM
To: discussion at nsrca.org
Subject: RE: "Miracle switch" failures


The problem with redundant batteries is that unless you put something
between the two circuits to isolate them, it is possible for one of the
batteries to go bad (shorted cell) and actually drain the other battery.

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