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"Peter Dohm" <lefty133@bellsouth.net> wrote
> I think that the point of "(well mostly)" may have been that even the
> tried
> and true combinations, such as certain Lycoming engines with approved
> constant speed props, failures can occur long after the design appears to
> be
> mature, and some of the failures may yet prove to be related to resonance.
> The moral may be that everything is experimental, but some things are less
> experimental than others.
It was noted (I think it was here) that when engine mount bushings wear out,
the properties of the mount/engine/airframe combination may have changed
enough that the resonance may become a factor again, where it was not - when
the mount bushings were fresh.
--
Jim in NC
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Re: PSRU design advantages
