X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 16 Jan 2012 14:41:50 -0500 Message-ID: X-Original-Return-Path: Received: from snt0-omc3-s10.snt0.hotmail.com ([65.55.90.149] verified) by logan.com (CommuniGate Pro SMTP 5.4.3) with ESMTP id 5352412 for lml@lancaironline.net; Mon, 16 Jan 2012 14:11:06 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.55.90.149; envelope-from=gary21sn@hotmail.com Received: from SNT112-DS10 ([65.55.90.135]) by snt0-omc3-s10.snt0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675); Mon, 16 Jan 2012 11:10:30 -0800 X-Originating-IP: [24.216.249.79] X-Originating-Email: [gary21sn@hotmail.com] X-Original-Message-ID: X-Original-Return-Path: gary21sn@hotmail.com From: "Gary Edwards" X-Original-To: "Lancair Mailing List" References: Subject: Re: Ceramic exhaust coatings X-Original-Date: Mon, 16 Jan 2012 11:13:35 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_029E_01CCD43F.E3E5FB30" In-Reply-To: X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 Seal-Send-Time: Mon, 16 Jan 2012 11:13:35 -0800 X-MimeOLE: Produced By MSN MimeOLE V10.20.0091.1100 X-OriginalArrivalTime: 16 Jan 2012 19:10:30.0750 (UTC) FILETIME=[83B647E0:01CCD482] This is a multi-part message in MIME format. ------=_NextPart_000_029E_01CCD43F.E3E5FB30 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Well, we had gotten numerous posts regarding the negatives of coating = and wrapping the outside of the exhaust systems. All have merit and all = are important contributions to the subject. To add to the subject, my stainless system is coated on both the = exterior and interior. Weld repairs, in the first year of operation for = cracks, were made as well as the addition of a ball joint with no = problems. As a result, I do not see that coated systems hinder repairs = as an issue. But there hasn't been much posted on the subject of interior heat = coatings for the exhaust system. My stainless system, Lancair supplied (Snowline Mfr.), and heavily = modified to make fit (by Snowline and myself) has been ceramic heat = coated on the interior since the planes completion nearly 13 years ago = (1999). With the exception of the first years fly-off test period, = where exhaust system repairs were made (including adding a tail end = spring), I have had no problems with pipe wall failure or cracking. All in all I still feel that the exhaust system is one of the weakest = items firewall forward and so make regular system checks of it every = time the cowls are off. Because of potential crack issues from = vibration and expansion, I might go with a mild steel system if I were = to do it again. I welcome any input on the aspects of interior heat coating of the = pipes. Gary Edwards ------=_NextPart_000_029E_01CCD43F.E3E5FB30 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Well, we had gotten numerous posts regarding the negatives of = coating=20 and wrapping the outside of the exhaust systems. All have merit = and all=20 are important contributions to the subject.

To add to the subject, my stainless system is coated on both the = exterior=20 and interior. Weld repairs, in the first year of operation for = cracks,=20 were made as well as the addition of a ball joint with no = problems. As a=20 result, I do not see that coated systems hinder repairs as an = issue.

But there hasn't been much posted on the subject of interior heat = coatings=20 for the exhaust system.

My stainless system, Lancair supplied (Snowline Mfr.), and heavily = modified=20 to make fit (by Snowline and myself) has been ceramic heat coated = on the=20 interior since the planes completion nearly 13 years ago = (1999). With=20 the exception of the first years fly-off test period, where exhaust = system=20 repairs were made (including adding a tail end spring), I have had = no=20 problems with pipe wall failure or cracking.

All in all I still feel that the exhaust system is one of the = weakest=20 items firewall forward and so make regular system checks of it = every time=20 the cowls are off. Because of potential crack issues from = vibration and=20 expansion, I might go with a mild steel system if I were to do it = again.

I welcome any input on the aspects of interior heat coating of the=20 pipes.

Gary Edwards

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