Paul,

How much of a flywheel does a 2-rotor rotary actually need?  I'm thinking
about a helicopter application running at 6000 rpm constantly with a
centrifugal clutch that will probably engage at about 2000 rpm.

Steve Brazil

Not much. They run well with a flex plate alone.
A heavy flywheel mitigates the torsional vibration
such as it is. Already at a low level.

Paul Lamar


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