Mailing List flyrotary@lancaironline.net Message #15095
From: Leon <peon@pacific.net.au>
Subject: Rotating Assy Stuff was Re: [FlyRotary] dynamic balancing
Date: Wed, 12 Jan 2005 07:38:42 +1100
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Marv,

To answer you question about the flywheel,  the assy is first balanced
without a flywheel or clutch (assuming we are using a lightened flywheel and
an auto rear counterweight).  Obviously on a stock MANUAL rotating set,  the
rear counterweight is incorporated into the flywheel itself.  (Don't have a
pic of this).

Once this rotating mass is all balanced out,  then the lightened flywheel is
bolted to the counterweight and balanced out.  Finally,  the pressure plate
is put on and again balanced out.  Alternateively,  the lightened flywheel
and the pressure plate can be balanced separately on a different mandrel.
Doesn't matter,  the results are the same.  Doing it this way is quicker &
easier.  Saves changing mandrels!!

The machine my Balancier uses is a Shenk.  There must be thousands of them
in engine shops around the Hew Hess Hay countryside.  It's a matter of
finding a shop who is willing to a bit of R&D,  and make the necessary
mandrel(s).  "Aint' hard!!  Not compared to balancing a 2 plane V8 crank
anyway.  That really IS a "Black Art"

Enjoy,

Leon
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