Bob,
That's how I see it - it works except for 1300 to 1500 rpm, as the springs are already in tension. Tracy speaks about torsional resonance, rather than torsional vibrations ( to me it's like splitting hairs) and he goes on to talk about the ride being smoother. Smoother ride equates to less transfer of vibrations, to me. Therefore if I wanted to make sure about isolating the gearbox from torsional vibrations/ resonance
large reversals (single rotor as I'm doing) I would not depend upon the springs.

However Ernest is happy to accept the concept for the convenience, which I suspect is the ability to drive the inlet shaft of the PSRU - with off the shelf components.
George (down under)

> Bob White wrote:
>> Isn't Tracy saying the clutch plate works, but it really isn't doing
>> much and it only helps in extreme situations, not in normal operation?
>>
>> Bob W.
>>
> That's how I read it, with the most important point being "it works". > It's a convenient and fairly lightweight method of getting the torque off > of the eccentric shaft and into the PSRU's stub shaft.  I'm not going to > ask any more of it than that. 8*)
>
> -- >
> http://www.ronpaultimeline.com
>
>