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Date: Mon, 24 Jan 2005 23:09:05 -0500
From: Finn Lassen <finn.lassen@verizon.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Flex plate <> Flywheel [FlyRotary] Re: flex plate
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Odd. My Ross used a custom 1/2" (I think) ALU plate with the starter 
ring gear crimped onto it.
That plate bolts onto the automatic counterweight.

The dampener assembly (with the spline for the input shaft) then bolts 
onto the ALU plate with 9 or 12  8mm allan head bolts, with 1/2" or 
maybe 3/4" ALU spacers between the dampener assembly and ALU plate.

Finn

Ernest Christley wrote:

> Paul wrote:
>
>>>
>>> What do the bolts screw into?  Rivnuts? A backing plate?
>>>
>>
>> The bolts screw directly into the existing holes on the automatic 
>> transmission flex plate. (which I used to think was a flywheel, until 
>> several helpful members of the Fly Rotary list helped to educate 
>> me).  Paul Conner
>
>
>
> I've read this several times, and still not quite sure I can believe 
> it.  The flex plate I have is thin.  In the .040" range thin.  I 
> realize that it will all be shear forces, but can 9 threaded holes be 
> expected to take the 800ft/lb of reaction forces that a typical NA 
> engine is expected to put out?
> (I believe I got the 800ft/lb number out of the discussion of the 
> Schwertz beam motor mount on PL website).  Just doesn't seem like it 
> could hold up.
>
>>>  Homepage:  http://www.flyrotary.com/
>>>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>>
>