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Date: Sun, 01 May 2011 01:07:44 -0400
From: Ernest Christley <echristley@att.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Back-plate Photos/ PM Alternator
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That's the one, Jarrett.  It's nothing more than a simple pie pan for the rotor.  6.459" in diameter and 1.517" deep. 
The shell is made of .100" thick mild steel.

The stator is more complicated.  It's a donut with winding mounts sticking out of it.  The it is .75" thick, but an 
additional .25" needs to be allowed on each side for the windings.  This would be the minimum height needed for a raised 
ring around the crank seal.  The inside diameter of the donut is 2.783".  The outside is 3.707".

The stator is made up of a bunch of thin sheet metal plates stacked together, all identical.  I could mail you one of 
those if you want to scan it.  I got my "sizing" parts from a motorcycle shop.  They were damaged when the guy wrecked 
his bike.  Nothing like having the real parts in hand when you're trying to make things fit.


Kelly Troyer wrote:
> Jarrett,
>  
>      This is the "Harley" PM alternator Ernest is referring to if you 
> have not seen it................
>