From: "Neil Unger 12348ung@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Flexplate replacement
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
References: <list-11822675@logan.com>
Message-ID: <9f1382de-0d10-157c-e985-be4669228c9f@gmail.com>
Date: Wed, 31 Oct 2018 07:00:57 +1100
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Joe,  I have kept quiet as I have a conflict of interest, in I sell 
another redrive that has a completely different cushion drive that does 
not use the flexplate at all.  It fits tracys reduction drive as well 
and bolts direct onto the e shaft and has a vulcanised rubber bushing to 
get the flex.  Sadly it is not cheap which embarrasses me, but such are 
the machining costs.It is listed on the rotarpower site.  Neil


On 10/31/2018 4:31 AM, Joseph Berki jskmberki@windstream.net wrote:
>
> I have tried to search the archives and found part of the story.
>
> I  think it will take a while to find all of the emails.
>
> Found pics of Dave’s broken flexplate.
>
> The pics of Dave’s flywheel are very disturbing.
>
> It appears that the destructive stresses occur between the 
> counterweight bolt circle and the torsional damper bolt circle.
>
> If a good flexplate could be modified to strengthen the areas could 
> this be a fix?
>
> Clean the flexplate  in the area of the bolt circles and perform a 
> layup of carbon fiber on both sides.
>
> A layer of Eglass would be placed between the carbon and steel 
> flexplate to prevent galvanic reaction.
>
> The mounting plate for the RD-1C would have to be shimmed the 
> thickness of the carbon fiber.
>
> Has anyone thought about this?
>
> Joe Berki
>


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    <p>Joe,  I have kept quiet as I have a conflict of interest, in I
      sell another redrive that has a completely different cushion drive
      that does not use the flexplate at all.  It fits tracys reduction
      drive as well and bolts direct onto the e shaft and has a
      vulcanised rubber bushing to get the flex.  Sadly it is not cheap
      which embarrasses me, but such are the machining costs.It is
      listed on the rotarpower site.  Neil<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 10/31/2018 4:31 AM, Joseph Berki
      <a class="moz-txt-link-abbreviated" href="mailto:jskmberki@windstream.net">jskmberki@windstream.net</a> wrote:<br>
    </div>
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        <p class="MsoNormal">I have tried to search the archives and
          found part of the story.<o:p></o:p></p>
        <p class="MsoNormal">I  think it will take a while to find all
          of the emails.<o:p></o:p></p>
        <p class="MsoNormal">Found pics of Dave’s broken flexplate.<o:p></o:p></p>
        <p class="MsoNormal">The pics of Dave’s flywheel are very
          disturbing.  <o:p></o:p></p>
        <p class="MsoNormal">It appears that the destructive stresses
          occur between the counterweight bolt circle and the torsional
          damper bolt circle.  <o:p></o:p></p>
        <p class="MsoNormal">If a good flexplate could be modified to
          strengthen the areas could this be a fix?<o:p></o:p></p>
        <p class="MsoNormal">Clean the flexplate  in the area of the
          bolt circles and perform a layup of carbon fiber on both
          sides. <o:p></o:p></p>
        <p class="MsoNormal">A layer of Eglass would be placed between
          the carbon and steel flexplate to prevent galvanic reaction.<o:p></o:p></p>
        <p class="MsoNormal">The mounting plate for the RD-1C would have
          to be shimmed the thickness of the carbon fiber.<o:p></o:p></p>
        <p class="MsoNormal">Has anyone thought about this?<o:p></o:p></p>
        <p class="MsoNormal">Joe Berki<o:p></o:p></p>
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