Jim;
I realize that these are
relative terms, but my opinion is that Tracy’s re-drive would not be called “tight”
tolerance. There is; what – ˝ back and forth play at the prop tip?
As I recall, Tracy had given this some consideration, and chose to
keep the relatively “loose” tolerance.
Al
Subject: [FlyRotary] Re: Torsionals
Ed,
Assuming (key word here) that Tracy's
PSRU can be regarded as "tighter
tolerances", mightn't rubber bushings effectively
"loosen" the tolerances and
get us INto more trouble than they get us OUT
of?
Just wonderin' .... Jim S.
Ed Anderson wrote:
> Hi Greg,
>
> Welcome to the
list.
>
> Torsional vibrations and resonance are a
fairly complex topic. .. In
> generally tighter tolerances raises the resonant
frequency of an assembly
> and looser tolerances lower it. Tighter
tolerances are generally more
> expensive than looser. ...By the way, since
the rotary does not have a
> negative torque region in its
> power curve this problem is minimal and can
generally be handled by some
> simple dampeners such as rubber disks,
etc.
>
> Ed Anderson
--
Jim Sower aka Destiny's Plaything
...
Crossville, TN; Chapter 5
Long-EZ N83RT, Velocity N4095T
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