jj(at)sdf.lonestar.org Guest
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Posted: Wed Sep 02, 2009 6:53 pm Post subject: Another power distribution scheme |
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I'm building a VFR Murphy Rebel with an electronic ignition Subaru
engine and dual rear mounted batteries. I've been working on a power
distribution plan for a couple weeks and I think I got it where I'm
happy with it but wanted to maybe get some input from you folks. You
know - get a few knowledgeable eyes on it and make sure I'm not doing
something really stupid.
Couple notable items,
I am using an internally regulated alternator - I chose not to have an
alternator disconnect. I figure the risk of damaging the alternator or
avionics through load dump was just too great. The B lead goes straight
to battery A. I did however provide a solution for the remote chance of
an OV fault by isolating battery A and running off battery B. Battery A
is sacrificed in this case.
The essential bus can be fed from either or both batteries. The
non-essential bus drops out during battery only operation - this can be
overridden for preflights etc.
I know I could just copy one of the Z drawings and they were a huge
knowledge boost to study but none seemed to fit exactly what I had in
mind and I get a lot of satisfaction going through the noodling process.
Thanks for looking,
Joel
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