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From: "Joe Hull" <JoeH@PilgrimTech.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Wire
Date: Thu, 5 May 2005 11:46:21 -0700
Organization: Pilgrim Technologies
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Joe (the other Joe) asks:
> Pusher builders. What size wire did you use, if your batteries were
> up
> front, for the starter?  Did you route 2 pairs for two busses?
> Ignition,
> fuel on one bus starter on the other?  Thanks for any help

I have two batteries - one up front - one on spar.  They are connected
to a common bus - BUT through diodes so they are isolated from each
other. I also installed 2 alternators and each alternator is dedicated
to only one battery (I didn't want to try to get into isolating
alternators and batteries in one charging circuit).  

Cable from alternators to batteries is #4, cables from batteries to
main bus is #2, cable on main bus from front to back is also #2.

My philosophy was to keep it simple - i.e. one bus with redundant,
isolated feeds to that bus. I have a combined battery, alternator,
ammeter gage/monitor that has alarm levels for 2 batteries and 2
alternators. Then I also have the EM-2 with its alarm level for bus
voltage as a backup.

Joe Hull
Bellevue (Seattle), Washington
Cozy MkIV #991 (working on Engine & Electrical & Finishing)
http://www.maddyhome.com/canardpages/pages/JoeHull/index.html