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Mailed for:  Epijk@aol.com

  In a message dated 1/6/2002 12:55:20 PM Pacific Standard Time,
            gwbraly@gami.com writes:

<<<The resulting peak torsional loading on the crank and structures are serious engineering challenges for the prop and for any reduction gear box  connected to a prop....>>>

Peak torsional loading is certainly an issue for the engine subsystem, but if the coupling between the engine and PSRU is done properly, the torsional  excitation applied to the PSRU drive gear can be made to virtually disappear. That level of attenuation also provides the prop with a turbine-like vibration environment.
            For how, see:      http://www.epi-eng.com/PSRU_Tech.htm
Jack Kane

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