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Date: Tue, 22 Feb 2005 14:05:02 -0700
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
From: Bill Dube <bdube@al.noaa.gov>
Subject: Re: [FlyRotary] Re: Back-up alternator thoughts (was: Ampsrequired
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At 02:30 PM 2/22/2005 -0500, you wrote:
>Kevin,
>  If you look at the Mistral Engines page you will see that they use a 
> standard crank type pulley to drive a second alt. The belt runs to the 
> outside of the bellhousing driving a standard alternator.
>Bill Jepson
>
>I admit to knowing little about them, but what of the idea to add an
>alternator function to the flex plate?  the rotation speed would be
>significantly higher at that diameter.  The PSRU seems to have plenty of
>space to tap into.

         To keep the cost down, you would want to keep the size down. 
Mounting the magnets to the flex plate sounds harder to do than mounting 
them to the smaller crankshaft pulley. The forces on them would be much 
greater if you mounted them near the edge of the flex plate.