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Message
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.
Thanks
Richard.
The 912S that was originally on the plane had a bad rattle
problem. If you didn't get it above about 2000 rpm on initial start, you
couldn't accelerate out of it. You just had to shut down, and try
again. That engine didn't have the "slipper clutch" that came out as
a mod for that problem.
I'm looking
forward to playing with all this eventually, as it will be a neat project.
Rusty
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