Paul, What is the durometer of the silicone sheet used in the TTC
   re-drive damper?............

   Kelly Troyer


40,50.60 or 70 1/2 inch thick

50 for one inch thick

Mcmaster Carr


For the coupling if you want it softer you can drill a hole in it.

Paul Lamar

Paul,
    Seriously considering replacing the rubber cushions in my RD2C
damper which are
1/2 inch thick..........Would like your opinion on what durometer of
silicone to use.........

Thanks,
  Kelly Troyer

Thats is not going to help. Your damper adds too much rotational mass to the
flex plate causing it to fail.

----------------------------------------------------------------------------------------

Lets rehash some of the facts.

Spinning a standard Lyc powered airplane  will permanently bend the steel
prop flange with a metal prop.

Going over a bump in the Everglades in an air boot will break a Cadillac
crank shaft and that is less than 3000 RPM.

The flex plate was never designed to transmit all torque from its
outer radius while spinning at 6000 to 8000 RPM in a continuous
turn.

Doing  this is like racing an auto transmission RX8 on a quarter mile
oval  race track at 100 MPH and 6000 to 8000 RPM.

All the factors that make Tracy's coupling design a bad idea.
He is a great asm programmer.

Paul Lamar

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