From: "Neil Unger" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: Flywheel or Spline modification
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
References: <list-9845481@logan.com>
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Date: Fri, 23 Jun 2017 11:40:31 +1000
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Kelly and all,  The flexdrive I now have under test for the new redrive 
bolts directly onto the E shaft and is not connected in any way to the 
flex plate, other than to hold it onto the E shaft.  I originally used 
polyurethane as the "Flex" but it disintegrated within hours.

Next was to go back to a flex rubber vulcanized coupling that looks 
great but yet untested.  The rubber is the same as engine mount rubber 
and if that fails there are many grades of rubber available.   Results 
shortly once I get my new Fuel Tech ECU to actually run the engine!!  
Neil Unger.


On 6/23/2017 11:15 AM, Kelly Troyer wrote:
> Mark,
>
>    The RD2C  direct  "Rigid" connection from flywheel to the Redrive 
> is somewhat a mystery to me and I suspect to most on the "Flyrotary" 
> list.........I have never seen any photos of this setup and only vague 
> descriptions.........I  do not know if any on
> the list purchased A RD2C and am aware of only the one installed on 
> Tracy's RV8.........
>    If any on the list has more knowledge or actually has seen one 
> please speak up and provide photos if possible.........I personally 
> have gone with the a (13 lb) steel flywheel and the"Soft" damper 
> provided with the RD1C by Tracy......This is the "Fix" for a failed 
> Gen 2 flex-plate used by Dave Leonard on his Turbo/13B RV6 while 
> racing at Reno..........
>
> Kelly Troyer
>
>
> On Thu, Jun 22, 2017 at 7:13 PM, Mark McClure 
> <flyrotary@lancaironline.net <mailto:flyrotary@lancaironline.net>> wrote:
>
>     So with my inability to find a gen2 RX-7 flexplate I have ordered
>     a lightweight steel Flywheel from RacingBeat.
>
>     My thoughts are to have the 4 bolt holes machined in the flexplate
>     or 6 holes in the spline and drill out the rivets to remove the
>     damper plate.
>
>     From reading the archives it seems the spline directly mounted is
>     what Tracy did for the RD-2C but that it's a different spline setup.
>
>     Anyone done this? Am I better to continue searching for the auto
>     flexplate?
>
>     Mark
>
>
>
>
>


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    <p>Kelly and all,  The flexdrive I now have under test for the new
      redrive bolts directly onto the E shaft and is not connected in
      any way to the flex plate, other than to hold it onto the E
      shaft.  I originally used polyurethane as the "Flex" but it
      disintegrated within hours.</p>
    <p>Next was to go back to a flex rubber vulcanized coupling that
      looks great but yet untested.  The rubber is the same as engine
      mount rubber and if that fails there are many grades of rubber
      available.   Results shortly once I get my new Fuel Tech ECU to
      actually run the engine!!  Neil Unger.<br>
    </p>
    <p><br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 6/23/2017 11:15 AM, Kelly Troyer
      wrote:<br>
    </div>
    <blockquote type="cite" cite="mid:list-9845481@logan.com">
      <meta http-equiv="Context-Type" content="text/html; charset=UTF-8">
      <div dir="ltr">Mark,
        <div><br>
          <div>   The RD2C  direct  "Rigid" connection from flywheel to
            the Redrive is somewhat a mystery to me and I suspect to
            most on the "Flyrotary" list.........I have never seen any
            photos of this setup and only vague descriptions.........I
             do not know if any on </div>
          <div>the list purchased A RD2C and am aware of only the one
            installed on Tracy's RV8.........</div>
          <div>  </div>
          <div>   If any on the list has more knowledge or actually has
            seen one please speak up and provide photos if
            possible.........I personally have gone with the a (13 lb)
            steel flywheel and the"Soft" damper provided with the RD1C
            by Tracy......This is the "Fix" for a failed Gen 2
            flex-plate used by Dave Leonard on his Turbo/13B RV6 while
            racing at Reno..........</div>
          <div><br>
          </div>
          <div>Kelly Troyer</div>
          <div><br>
          </div>
        </div>
        <div class="gmail_extra"><br>
          <div class="gmail_quote">On Thu, Jun 22, 2017 at 7:13 PM, Mark
            McClure <span dir="ltr">&lt;<a
                href="mailto:flyrotary@lancaironline.net"
                target="_blank" moz-do-not-send="true">flyrotary@lancaironline.net</a>&gt;</span>
            wrote:<br>
            <blockquote class="gmail_quote">So with my inability to find
              a gen2 RX-7 flexplate I have ordered a lightweight steel
              Flywheel from RacingBeat.<br>
              <br>
              My thoughts are to have the 4 bolt holes machined in the
              flexplate or 6 holes in the spline and drill out the
              rivets to remove the damper plate.<br>
              <br>
              From reading the archives it seems the spline directly
              mounted is what Tracy did for the RD-2C but that it's a
              different spline setup.<br>
              <br>
              Anyone done this? Am I better to continue searching for
              the auto flexplate?<br>
              <span class="HOEnZb"><br>
                Mark<br>
                <br>
              </span><br>
              <br>
              <br>
              <br>
            </blockquote>
          </div>
        </div>
      </div>
    </blockquote>
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