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Message-ID: <421B6941.9080304@earthlink.net>
Date: Tue, 22 Feb 2005 11:17:53 -0600
From: David Staten <Dastaten@earthlink.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: 2nd Alternator stuff... revisited..
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I started thinking about the ongoing discussion of 2nd alternators and 
redundancy, and the fact that slinging a belt up front on a dual 
alternator dual belt system is at significant risk for taking BOTH belt 
driven alternators offline. Which brought up the possibility of mounting 
something on the prop-side of the engine..
 
Does anyone have any experience mounting a gear driven alternator 
attached to/driven by the flexplate gear-ring? Would something along the 
lines of an 0-200 style permanent magnet alternator be useable? 
example:  http://www.aircraftspruce.com/catalog/eppages/alt200g.php 
 
On a side note, what is the ABSOLUTE MINIMUM required power to keep the 
engine running using the EC-2, Delco Coils, ONE electric fuel pump 
(assume some generic power draw here).. No electric water pumps, not 
worrying about landing lights, avionics (Dynon has a battery backup of 
its own).. Will the 12 amps generated by the above styled alternator be 
enough to keep the engine itself running on its own "essential bus"
 
Any caveats to running a gear driven device with the gear teeth exposed 
(or.. is there something I'm not seeing here?)
 
Just fishing for ideas...

Dave