Barry Gardner wrote:

Paul,

In reading Husa's article that you referenced on the list, I
noticed the following quote:
"Even more critical is the application of Wankel engines as they
produce a different mode of torsional vibration from that
generated by conventional piston configurations. The coupling,
even one designed for a bigger engine, may not be able to handle
the vibration feed-back encountered with the rotary."

Any comments on the import of this statement? Implications for
planetary drives?

He also wrote: "The only configuration I would be willing to
seriously examine [without the use of any torsional dampening
system] is the silent chain."

Comments?

In the time I've been on the list, I've read allusions to Everett
Hatch's struggles with torsional vibration but have always had
the impression that he was somehow working on the problem in the
wrong way. I've never been clear, however, if or how the problem
went away.

Always anxious to learn.

Barry Gardner
Wheaton, IL

This has been discussed at length on here and that is of course on the CD.

The below chart shows the torque pulses out of a two rotor compared to
a four cylinder four stroke piston engine. The torque variations from
the two rotor are much less and they do not go negative. The author
and Everitt Hatch were wrong. Everitt had some other unrecognized
problem.

Paul Lamar

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