----- Original Message -----
Sent: Monday, February 06, 2006 8:52
AM
Subject: [FlyRotary] Re: Single rotor
smooth as silk now
Would a single with no dampers put the resonance
beyond the
useful range?
Good
question Ernest. I thought about trying the RD-1C drive with a
solid plug where the rubber dampeners normally live, but when I considered
that all the normal gear lash play would still be there, I realized it
was probably not going to be much of a test.
How much gear lash is there on a typical
Hirth, or Rotax gear box?
Cheers,
Rusty
There are two issues to cope with, one is resonances and
the other is transferring the torque pulses. The torque pulses are transferred
completely in a indefinitly stiff system. We do not want that, because of the
internal forces involved. That leaves the resonances created by coupling and
element flexing properties. I believe the only way to stay out of the
resonances is to keep them low. This is what ROTAX is doing, a 582 has gear
rattling around idle. When you watch a ROTAX starting up it is very obvious
when the rattling occurs. I have not observed any rattle on my C-Box with the
SOOB.