REFLECTOR: From IVO

[Jim Sower]

Unfortunately, a spring damper would introduce its own harmonic envelope 
and might get you INTO a lot more trouble than it gets you OUT OF.

Just a theory .... Jim S.


Brian Michalk wrote:

>What about some sort of mechanism like what is found on clutch plates?
>It's very lightweight, and couples several hundreds(for trucks) of
>horsepower through four or so springs from the splined transmission shaft to
>the clutch pads.
>
>Slip it in between a standard SAE ARP502 prop pad, and the corresponding
>prop.
>
>Don't need the pads.  I'll bet the one from my Dodge weighs less than five
>lbs with the pads.
>At least there would be no heat (not much anyway), because this wouldn't be
>a damper (like a fluid filled shock absorber).
>
>Only thing is that the automotive design is strictly shear.  A prop design
>would have to handle thrust loads, which would require a thrust bearing if
>one wanted to keep the friction temperatures down.
>
>
>  
>
>>Brian; that is very interesting.  The viscous damper is the best type of
>>damper for torsional vibration, and eliminating resonance.  To be most
>>effective, it could be "tuned" to a specific engine-prop
>>combination; but in
>>any case, cold make a large difference in pulse stress transmitted to the
>>prop. Maybe with one of these on a Lyc the IVO would work there also?
>>
>>Al
>>
>>
>>    
>>
>
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