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From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [LML] Re: LNC4-Building for Good CG
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Date: Tue, 21 Sep 2004 20:45:15 -0400
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Posted for "Douglas W. Johnson, MD" <Lancair1@bellsouth.net>:

  I used tungsten and DU in my IVP rudder.  With a specific gravity of around
  20, as opposed to around 10 for lead, the smaller denser material could be
  shifted more anterior (away from the fulcrum point) in the counterweight
  cavity.  This in turn allowed me to shave off several pounds from the
  counterweight.  The overall lighter tail moved my CG forward to the point
  that, coupled with the Hartzell prop, there is NO configuration in which I
  can load the plane to aft CG within its weight envelope.
  
  Just another idea...
  Doug Johnson
  LIVP 654DM
  770hrs and counting...