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At 09:25 AM 12/22/03 -0500, Joseph Spelz wrote:

>----[Please read http://ercoupers.com/disclaimer.htm before following any

>advice in this forum.]----
>
>
>I am the new owner of '50 mdl G.

Congratulations and welcome aboard!

>  A possible cause is a repair patch on the spinner,
>although that seems to be a trivial mass change that close to the center
>of rotation.

That could very well be the problem.  Yes, it is small.  Yes, it is close
to
the center.  But 2,000 RPM can magnify considerably.

>Can the
>airplane be legally flown w/o the spinner?

Yes, because I have seen it done that way.  However, there are cooling
issues.  The spinner redirects the air flow.

>   The C-85 installed  has a taper shaft.

This could also be an issue.  Reports of the prop coming off of the
tapered
shafts are available - see FAA.  You got your glider rating?

>How difficult is it to R&R the spinner on this engine?

Not very, Joe.  I have to do it (and you should too) every annual.
Looking
for cracks in the spinner backer plate, etc.  Remember, should that baby
come off, it can ding a prop, your windshield, head, etc.  There are
screws
to the spider in the front of the prop, and screws to the backer plate.

I had my engine dynamically balanced, and it was an improvement.

Percy in Portland


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