X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 12 Oct 2007 20:00:03 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-mealy.atl.sa.earthlink.net ([209.86.89.69] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTP id 2383258 for lml@lancaironline.net; Fri, 12 Oct 2007 10:17:23 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.69; envelope-from=leighton@teleport.com DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=teleport.com; b=WMmy0JS4oJbQWZWGbzojqZDgZcI9WuyQeskJNniseSN62A5cCgWWWkp8L0mUikD1; h=Received:Message-ID:From:To:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE:X-ELNK-Trace:X-Originating-IP; Received: from [4.242.171.57] (helo=user) by elasmtp-mealy.atl.sa.earthlink.net with asmtp (Exim 4.34) id 1IgLJl-0005fl-HA for lml@lancaironline.net; Fri, 12 Oct 2007 10:16:46 -0400 X-Original-Message-ID: <014801c80cda$84fc4bf0$39abf204@user> From: "Leighton" X-Original-To: "Lancair Mail list" Subject: Legacy vibration X-Original-Date: Fri, 12 Oct 2007 07:16:41 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0145_01C80C9F.D6176550" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 X-ELNK-Trace: ea0fe3d44b30ba0fc355332e9c4b49d598c48853aa0a5d89c118b2a2e6faaeba711737d8bae21127350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 4.242.171.57 This is a multi-part message in MIME format. ------=_NextPart_000_0145_01C80C9F.D6176550 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Erik, Your speed related vibration sounds like a similar situation we = encountered a few years ago. After much head scratching, and the = resulting slivers, it turned out that the leading edges of the nose gear = doors were acting like the reeds on a woodwind instrument, albeit not as = tuneful. To fix it we bonded some scrap 'glass pieces to the inside of = the lower cowl where it crosses the front of the gear opening, lowering = that area below the level of the door leading edges. No more vibration. = This isn't necessarily your problem but it's easy to shim the cowl and = find out. For those still building, it's a good idea to assure the = lower cowl is below the level of the nose gear doors. Can't hurt. Leighton Mangels ------=_NextPart_000_0145_01C80C9F.D6176550 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Erik,
 
Your speed related vibration sounds like a similar = situation=20 we encountered a few years ago.  After much head scratching, and = the=20 resulting slivers, it turned out that the leading edges of the nose = gear=20 doors were acting like the reeds on a woodwind instrument, albeit not as = tuneful.  To fix it we bonded some scrap 'glass pieces to the = inside of the=20 lower cowl where it crosses the front of the gear opening, lowering that = area=20 below the level of the door leading edges.  No more = vibration.  This=20 isn't necessarily your problem but it's easy to shim the cowl and find=20 out.  For those still building, it's a good idea to assure the = lower cowl=20 is below the level of the nose gear doors.  Can't = hurt.
 
Leighton Mangels
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