So what durometer is your gut feeling now
that you went this far?
Hi George,
I don't think you can compare the durometer of one damper
to another, because the physical size is as important as the hardness of the
rubber. The Autoflight drive uses a stock Centaflex coupler that's only
available in 50 and 60 durometer. It's a fairly large diameter, and
thick coupler. 50 was better than 60, but two 50's (effectively 25) in
series was way too soft. Maybe a 40 would be good, but it doesn't
exist.
Richard seems to be having better luck with
the Hirth drive. Two strokes are rough at low rpms, so perhaps they
already have the right damper for the job. I also suspect his
engine has softer power pulses at low rpms. It's a 12A for one, and PP
for another. PP is great at high rpms, but not know for good power down
low. It's the best theory I
have.
Cheers,
Rusty
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