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Date: Mon, 28 Feb 2005 12:21:49 -0500
From: Ernest Christley <echristl@cisco.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Racemate alt/water pump
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Russell Duffy wrote:

> option 3 - a 'low-profile' design that would easily fit between the PSRU
> and engine.  Under 1.25" would work I think, but someone will need to
> measure this to be sure.
>
>  
> Hi Ernest,
>  
> I took a (bad) pic of this yesterday, and estimated some measurements 
> as well. 


Wow, that is tight.

I've not consulted Tracy, but I'm sure that he would strongly advise 
against recessing the PSRU mounting bolts.  That would be cutting into 
the material that's holding the prop on to the airplane.  Bad idea.

I think the best shot we have is to get lucky.  If the rotor diameter is 
less than what is available inside the mounting bolt ring, then  it's a 
good match.  If the rotor is large enough for the magnets to fit outside 
the mounting bolt ring, and the stator coils will fit down over the bolt 
heads, and the bolt head don't induce a lot of eddy currents, then it's 
a match.  If the moon is in secession, and Jupiter aligns with Uranus on 
a third Wednesday. . . awe, shucks.  The only way to know is to get one 
and try it.