Return-Path: Received: from postoffice2.direcpc.com ([198.77.116.30]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-70783U4500L450S0V35) with ESMTP id com for ; Tue, 13 Feb 2001 00:57:08 -0500 Received: from hostname ([207.168.131.234]) by postoffice2.direcpc.com (Post.Office MTA v3.1.2 release (PO203-101c) ID# 0-45425U50000L50000S0) with SMTP id AAA18392 for ; Tue, 13 Feb 2001 01:10:09 -0500 Message-ID: <002501c09581$d815c8c0$4968140a@direcpc.com> From: "Fred Moreno" To: "Lancair List" Subject: Lancair IV elevator counterweight Date: Mon, 12 Feb 2001 21:57:19 -0800 X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> In response to Joe's inquiry, I would recommend that the leading edge of the elevator counterweight be modified to have a radius equal to half the counterweight thickness so that it is cylindrical. A tour of the airport shows that many aircraft and virtually all light aircraft certified for known icing use a configuration akin to this. Look at a Turbo 210 or a Turbo 182 RG to see what I mean. You can make a new leading edge in a form, cut off the square leading edge on the as-supplied elevator, and bond the new shape on. Or you can grind off the square corners leaving a narrow rib of carbon at the center leading edge, and then bond new carbon on being careful to shape it as desired. I did the second method, and recommend the first. To fill the new shape, I recommend powdered tungsten available as a waste product from the machine tool industry. My source (several years ago) was Hi-Temp Specialty Metals, Inc., Industrial Park, PO Box 2188, Willingboro, NJ 08046. Ask for crushed tungsten about the consistency of sand and finer. As I recall it was under $5.00 per pound. When mixed with epoxy the powdered tungsten has the same density of solid lead, the consistency of wet beach sand, and can be spooned into the cavity through a hole on the inside surface of the counterweight arm. Pour the tungsten into mixed epoxy and the surplus epoxy will rise to the surface where it can be decanted. I also used this mixture to cast tapered aileron counterweights in Plaster of Paris molds. Fred Moreno >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>