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Date: Wed, 23 Feb 2011 09:09:33 -0500
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From: Lorn H Olsen <lorn@dynacomm.us>
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Subject: Re: prop balance
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Jon,

I have the silicone harmonic dampener and I still have my prop balanced. =
The balancing made quite a pit of difference in the graphs.

I recommend that you have your prop balanced by someone other than =
"local experienced prop balance person in Redmond".

Lorn

> From: JON ADDISON <jraddison@msn.com>
> Date: February 21, 2011 8:25:37 AM EST
>=20
> Question?
> On my LNC2-360 (BIB plus high comp pistons) there is an add-on =
"balancer" bolted to the face of the starter ring gear.
> It is supposed to balance the engine with its internal weights that =
are supposed to arrange themselves to cancel or dampen our any sensed =
vibrations.
> The "balancer" is about 2 inches in debth and almost the diameter of =
the ring gear; it is all self contained and you would have to take the =
prop off to get it off and take it apart if one was at least currious =
what was inside of it.
> =20
> It's difficult to know if a 4 cyclynder Lycoming is as smooth as it =
can be, because it's not a real smooth engine under the best of =
conditions.
> =20
> I inquired to a local experienced prop balance person in Redmond and =
they concluded that because of the dynamic balancer on the ring gear, he =
would not attempt to balance the engine with his expensive balance work, =
as he thought the attached dynamic balancer would change the internal =
weight at will.
> =20
> Does anyone have any experience with these dynamic balancers attached =
to the ring gear???
> =20
> Cheers
> =20
> Jack Addison  N360JS
> near Redmond, OR


--
Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
LNC2, FB90/92, O-320-D1F, 1,790 hrs, N31161, Y47, SE Michigan