Dual electrical systems

I am looking for guidance or ideas for a double battery installation on an -10 QB fuselage. CG implications? Brand of batteries? I am planning dual electronic ignition. Where is a good source of information?

Bob Knuckolls aerolectric is a great source for all things electrical.

http://www.aeroelectric.com

If your purpose for dual electrical systems is EI, have you considered PMags? They don't require redundant power source because they generate their own power.

http://www.emagair.com

Some EFIS come with small back up batteries as well. This might remove the need for a 'fully' redundant electrical and be lighter/simpler.

Check out Bob's power diagram "Z" I believe. It's the one I'm using as my baseline. I'm using 2 680's , 2 contactors and two busses that can use both or either battery. Diodes protect the systems from reverse polarity.

Try this link:

http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdf/Z14L_1.pdf

Dual Electrical, Dual Sheet Diagram

Rick S. said:

Try this link:

http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdf/Z14L_1.pdf

Click to expand...

Here's the other half of that diagram...

http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdf/Z14L_2.pdf

Oops!!! sorry bout that. Two sheets it is, Hey ya can't give EVERYTHING away!!!

Anyhow....Get yourself over to the Aeroelectric page and get going on the "education" part of this wonderful pastime.

Dual Electric

I have also installed a dual electric setup using Bob N.'s Z-14. Battery tray was modified to accept a pair of Odyssey PC-680s. The associated pair of battery contactors are on a piece of angle attached where the original single contactor was. Adjacent to the contactors and attached to the J-channel are a pair of small fuse blocks to supply a battery buss. Crossfeed contactor (per Z-14) is on firewall, above and to the right of the starter contactor. Fuse holders for alternator B leads are mounted above crossfeed contactor. Here are a few pictures that I have handy.

http://members.cox.net/bcondrey/tray1.jpg
http://members.cox.net/bcondrey/tray5.jpg
http://members.cox.net/bcondrey/tray6.jpg
http://members.cox.net/bcondrey/fuse2.jpg

Bob #40105
Firewall Forward