From: "Marc Wiese cardmarc@charter.net" <flyrotary@lancaironline.net>
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To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
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Subject: RE: [FlyRotary] Re: Flexplare Replacement
Date: Tue, 6 Nov 2018 17:12:13 -0600
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Neil,
Can I see a sketch of how it all fits together front to back?
Marc

-----Original Message-----
From: Rotary motors in aircraft <flyrotary@lancaironline.net>=20
Sent: Tuesday, November 06, 2018 3:28 PM
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: Flexplare Replacement

Joe,  There is another way which is my cushion drive (attached) which =
will cost approx $500 USD plus freight with the current exchange rate. =
Main cost is the splined drive block so that it matches up with Tracy's =
splined input shaft.  The photo shows the 2 parts of the unit, spacer =
and splined cushion drive, which bolt direct onto the e shaft with the =
normal flexplate  in between. Uses the normal flexplate with no strain =
whatever on the flexplate.  Your money and your decision!!

Neil Unger


On 11/7/2018 6:06 AM, Jeff Whaley jwhaley@datacast.com wrote:
> Hi Joe, I believe there are two ways you can go, though I don't have =
part numbers or exact details for you:
> 1) Tracy's Method: Use an aluminum flywheel directly, including the =
center spline coupling - this eliminates the damper plate and the need =
to drill holes. The catch is the spline does not match the original =
RD1-C prop shaft spline.
> 2) Dave Leonard's Method: Use an aluminum flywheel, no center spline, =
mount the damper plate, remove material from one face to adjust ring =
gear position relative to starter.
> A quick search of the list should get you more info as it was =
discussed lately ...
> Jeff
>
> I have been looking at various flywheels for possible candidate =
replacement.
>
> I thought the aluminum units would provide the least amount of weight =
gain.
>
> I noticed that there are a lot of holes in these units including the =
replaceable friction area with many screw holes.
>
> I was under the impression that the holes in the flexplate promoted =
stress cracks.
>
> These flywheels however may have sufficient material to counteract the =
stress potential.
>
> Can someone provide a brand or part number that is acceptable?
>
> I believe that the additional machining to modify one of these =
flywheels is the holes for the torsional damper.
>
> Thanks for any help.
>
>  =20
>
> Joe Berki
>
> --
> Homepage:  http://www.flyrotary.com/
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