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

Paul, Will be using the same steel flywheel that Dave Leonard used
to replace a failed stock 13B gen2 flex-plate.......

Thanks, Kelly Troyer

Is that an Exedy? What is the weight? What are you paying for it? The
stock flex plate is 4.25 pounds. Tracy plate, nuts and volts is
another 5.5 pounds. Some of those exedy flywheels are 12.5 pounds.


Paul


Paul,

I have an "ACT" "ProLite" steel flywheel (11.8 lbs)...........I did
not pay the price shown on the ad below but am too lazy to look up
what I paid............Dave Leonard may have used the "ACT"
"StreetLite" version of this flywheel (13.8 lbs)...........These are
the flywheels I suggested to him at the time........I would still
like your opinion of what durometer of silicone as a replacement for
Tracy's rubber damper...........

Thanks, Kelly Troyer

Well Tracy's damper has very little torsional deflection.
It will bottom out at 5 degrees is my guess.

I have no idea what will work best if at all :-)

Is your engine running with a prop on the gear box?
Have you flown it?

Paul Lamar

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