X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 22 Dec 2010 07:51:26 -0500 Message-ID: X-Original-Return-Path: Received: from nskntmtas02p.mx.bigpond.com ([61.9.168.140] verified) by logan.com (CommuniGate Pro SMTP 5.3.11) with ESMTP id 4650710 for lml@lancaironline.net; Wed, 22 Dec 2010 07:27:27 -0500 Received-SPF: pass receiver=logan.com; client-ip=61.9.168.140; envelope-from=frederickmoreno@bigpond.com Received: from nskntotgx04p.mx.bigpond.com ([121.215.147.94]) by nskntmtas02p.mx.bigpond.com with ESMTP id <20101222122650.MNRK3622.nskntmtas02p.mx.bigpond.com@nskntotgx04p.mx.bigpond.com> for ; Wed, 22 Dec 2010 12:26:50 +0000 Received: from Razzle ([121.215.147.94]) by nskntotgx04p.mx.bigpond.com with ESMTP id <20101222122649.EBP6348.nskntotgx04p.mx.bigpond.com@Razzle> for ; Wed, 22 Dec 2010 12:26:49 +0000 MIME-Version: 1.0 X-Original-Message-Id: <4D11EE7E.00007D.03300@RAZZLE> X-Original-Date: Wed, 22 Dec 2010 20:26:38 +0800 Content-Type: Multipart/Alternative; charset="us-ascii"; boundary="------------Boundary-00=_E8XTI4D8WCW000000000" X-Mailer: IncrediMail (6244788) From: "Frederick Moreno" X-FID: FLAVOR00-NONE-0000-0000-000000000000 X-Priority: 3 X-Original-To: "Lancair Mail (lml@lancaironline.net)" Subject: Fw: Cowling Deformation X-Authentication-Info: Submitted using SMTP AUTH LOGIN at nskntotgx04p.mx.bigpond.com from [121.215.147.94] using ID frederickmoreno@bigpond.com at Wed, 22 Dec 2010 12:26:48 +0000 X-RPD-ScanID: Class unknown; VirusThreatLevel unknown, RefID str=0001.0A150205.4D11EE89.0144,ss=1,fgs=0 --------------Boundary-00=_E8XTI4D8WCW000000000 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable =0D =0D <>=0D =0D It is standard for the top cowl to bulge upwards. If the baffling gap gr= ows too large on top, the rubber baffle blows back and flaps against the cowl making an exciting noise. =0D =0D I installed cowl flaps which make the problem much worse when the cowl fl= aps are closed. Anticipating a problem, I added foam/unicarbon/fiberglass = BID ribs to the top cowl. Deformation now is zippo. =0D =0D Fred --------------Boundary-00=_E8XTI4D8WCW000000000 Content-Type: Text/HTML; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

<<When in flight, the bottom of my cowling is compressed upwar= ds by about 1.5" to 2". Make sure you do not have anything that this comp= ression could effect.>>

It is standard for the top cowl to bulge upwards. If the baffl= ing gap grows too large on top, the rubber baffle blows back and flaps ag= ainst the cowl making an exciting noise.

I installed cowl flaps which make the problem much worse when the co= wl flaps are closed. Anticipating a problem, I added foam/uni= carbon/fiberglass BID ribs to the top cowl. Deformation now i= s zippo.

Fred

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