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From: "Paul" <sqpilot@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-754698@logan.com>
Subject: Re: [FlyRotary] Re: 2nd battery Re: Amps required to run engine &amp- hours available
Date: Tue, 22 Feb 2005 18:17:15 -0600
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For my personal preferences, just go have an alternator that was not belt 
driven would be great.  I don't like the thought of a belt braking and 
possibly damaging my raadiator, radiator hoses, oil cooler, oil hoses, spark 
plug wires, ignition coil wires, firewall mounted control mechanisms, etc. 
Even if I only had one alternator, but it was not belt driven, I would call 
that a great improvement.  Paul Conner

----- Original Message ----- 
From: "Mark R Steitle" <mark.steitle@austin.utexas.edu>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, February 22, 2005 1:33 PM
Subject: [FlyRotary] Re: 2nd battery Re: Amps required to run engine &amp- 
hours available


Bill,
OK, now you've got my interest!  A crank mounted alternator could make a
great backup power source.  So, why can't we come up with a simple
method of mounting a PM alternator, or 55 amp ND, on the end of the
crankshaft?  That shouldn't be too hard to do. (easy for me to say)

I went with the Aero-Electric Z-14 approach (two alts, two batteries).
I rationalize that chances are slim that both alts will quit on the same
flight, unless I break a belt and it takes out the second belt.  If I
lose both alternators, then reserve battery power (dual Odyssey 680's)
will be used to get me to a safe landing site.  The plan is to replace
the belts at every annual.  Biggest worry is engine overheating &
seizing due to loss of water pump.  An EWP would fix that.

Mark


I believe they have also done crankshaft pulley alternators.
Bill Jepson


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