Return-Path: Received: from out009.verizon.net ([206.46.170.131] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 604765 for flyrotary@lancaironline.net; Wed, 12 Jan 2005 12:47:53 -0500 Received-SPF: pass receiver=logan.com; client-ip=206.46.170.131; envelope-from=rotary.coot@verizon.net Received: from [65.239.57.9] ([67.227.200.243]) by out009.verizon.net (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP id <20050112174716.IKYA24088.out009.verizon.net@[65.239.57.9]> for ; Wed, 12 Jan 2005 11:47:16 -0600 Mime-Version: 1.0 X-Sender: res0c5l1@incoming.verizon.net Message-Id: In-Reply-To: References: Date: Wed, 12 Jan 2005 09:45:20 -0800 To: "Rotary motors in aircraft" From: Ken Welter Subject: Re: [FlyRotary] Rotating Assy Stuff was Re: [FlyRotary] dynamic balancing Content-Type: multipart/alternative; boundary="============_-1106570121==_ma============" X-Authentication-Info: Submitted using SMTP AUTH at out009.verizon.net from [67.227.200.243] at Wed, 12 Jan 2005 11:47:15 -0600 --============_-1106570121==_ma============ Content-Type: text/plain; charset="us-ascii" ; format="flowed" Hey Leon You talk about mandrels, are the mandrels for balancing the rotors first?? I assume that you balance the rotors first and then put the on the e-shaft and balance the assembly. Ken >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 --============_-1106570121==_ma============ Content-Type: text/html; charset="us-ascii" Re: [FlyRotary] Rotating Assy Stuff was Re: [FlyRotary] dy
   Hey Leon
  You talk about mandrels, are the mandrels for balancing the rotors first??
  I assume that you balance the rotors first and then put the on the e-shaft and balance the assembly.
  Ken





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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