Return-Path: Sender: (Marvin Kaye) To: lml Date: Sat, 01 Mar 2003 23:08:39 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d07.mx.aol.com ([205.188.157.39] verified) by logan.com (CommuniGate Pro SMTP 4.0.6) with ESMTP id 2041224 for lml@lancaironline.net; Sat, 01 Mar 2003 22:32:28 -0500 Received: from Billhogarty@aol.com by imo-d07.mx.aol.com (mail_out_v34.21.) id q.159.1c9a162f (16930); Sat, 1 Mar 2003 22:32:10 -0500 (EST) From: Billhogarty@aol.com X-Original-Message-ID: <159.1c9a162f.2b92d539@aol.com> X-Original-Date: Sat, 1 Mar 2003 22:32:09 EST Subject: Re: [LML] Gear Doors X-Original-To: lml@lancaironline.net X-Original-CC: Haywardmachinery@aol.com, bhogarty@netzero.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_159.1c9a162f.2b92d539_boundary" X-Mailer: 7.0 for Windows sub 10625 --part1_159.1c9a162f.2b92d539_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Mike Hutchins: >From all the great advice that I have received on the LML concerning my gear door flexing problem, I have decided on a double belt and suspenders approach. I am starting with the basic Lancair Service Bulletin approach with the foam and 1/4 inch HLPE and to that I am burying a 1/2 inch diam. aluminum tube formed in a long "L" . This is all buried in micro and 5 bid carbon fiber. Finally, I intend to add (as you suggest) braces at about 4 or 5 different spots to support the slider assembly; with at least one brace running across the large part of the door. I bed my foam as you mention except that after painting both surfaces with epoxy, I add a thin layer of micro to both, join them, add weight as necessary, and then add additional micro to fair in the edges. After it cures, I scuff the surfaces lightly and add my carbon fiber. Yes., its another step and yes it does add a little more weight, However it avoids placing the carbon fiber at 90 degree angles and, I believe, promotes a better bond that is less likely to develop problems later on. Assuming that this approach works (no flexing and gear retracts without problems), I will have some photos available for anyone who would like to see them. Best Regards, Bill Hogarty --part1_159.1c9a162f.2b92d539_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
Mike Hutchins:

From all the great advice that I have received on the LML concerning my gear= door flexing problem, I have decided on a  double belt and suspenders=20= approach.


I am starting with the basic Lancair Service Bulletin approach with the foam= and 1/4 inch HLPE and to that I am burying a 1/2 inch diam. aluminum tube f= ormed in a long "L" .  This is all buried in micro and 5 bid carbon fib= er.  Finally, I intend to add (as you suggest)  braces at about 4=20= or 5 different spots to support the slider assembly;  with at least one= brace running across the large part of the door.

I bed my foam as you mention except that after painting both surfaces with e= poxy,  I add a thin layer of micro to both, join them, add weight as ne= cessary, and then add additional micro to fair in the edges.  After it=20= cures, I scuff the surfaces lightly and add my carbon fiber.  Yes., its= another step and yes it does add a little more weight,   However=20= it avoids placing the carbon fiber at 90 degree angles and, I believe, promo= tes a better bond that is less likely to develop problems later on.

Assuming that this approach works (no flexing and gear retracts without prob= lems), I will have some photos available for anyone who would like to see th= em.

Best Regards, Bill Hogarty

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