Thanks  Bill.

Not all HTD belts use aramid fiber. They still have a spring rate  all
be it small. Shafts twist, props have MMOI, components have MMOI  etc.
Unless the drive, engine and prop are analysed as a system you  won't
know if you need a dampner or not. It can't be assumed. Run  the
numbers and compute a Campbell plot and you will have a good  idea.

Ken Bauman

Some new Harley belts use carbon fiber.
--
Paul Lamar ...No rotor no motor.



Guys,
True there is some stretch in any belt. My comment is for the guys that
somehow think there is significant "give" to a toothed belt drive. This isn't
true the movement is usually less than a steel roller chain! All systems have
some movement, or strain if you will. We just need to dispel the idea that these
belts stretch enough to absorb any of the power pulse. You would still need
a  damper if you needed one with a chain or gears. That is all I'm trying to
say.
Bill Jepson




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