X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmfepo102.cox.net ([68.230.241.144] verified) by logan.com (CommuniGate Pro SMTP 5.4c2o) with ESMTP id 4885323 for flyrotary@lancaironline.net; Mon, 28 Feb 2011 13:20:39 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.144; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmfepo102.cox.net (InterMail vM.8.01.04.00 201-2260-137-20101110) with ESMTP id <20110228182003.IVUX18463.fed1rmfepo102.cox.net@fed1rmimpo01.cox.net> for ; Mon, 28 Feb 2011 13:20:03 -0500 Received: from BigAl ([72.199.216.14]) by fed1rmimpo01.cox.net with bizsmtp id DWL21g00S0KDB3c03WL2lk; Mon, 28 Feb 2011 13:20:02 -0500 X-VR-Score: 0.00 X-Authority-Analysis: v=1.1 cv=Uf0N7Q8inZd1smlX5QkgY0Nt7egyp8IgCiz8thsnNmI= c=1 sm=1 a=B9PaJCCeMWsA:10 a=TPvrVRyicAsl4VeEYn0L5g==:17 a=W7Cl4PPDXTHOhNuB8wcA:9 a=MuAoRGgYoCbSuCfd-PEA:7 a=fcyRm_igiRSQnTbXoBEYvbswSoAA:4 a=CjuIK1q_8ugA:10 a=AMB9KvXO-rZKJNaFJpQA:9 a=irwYE7cugjqGj2ahBvoA:7 a=jduVzlewalgIndw7p3VCeiiKAJkA:4 a=TPvrVRyicAsl4VeEYn0L5g==:117 X-CM-Score: 0.00 Authentication-Results: cox.net; none From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Steve Boese TDC Finder Date: Mon, 28 Feb 2011 10:20:26 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0018_01CBD731.1E2D3680" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6863 Importance: Normal Thread-Index: AcvXa4ANj3bWjXwWQ8+EkiMoFJ9CtQAB9Mnw X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5994 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0018_01CBD731.1E2D3680 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable > Al > =20 Let me offer this idea. If you know where the tip seals are, then you=20 can derive TDC. Level the base of the engine, and the tip seals should=20 line up verically. Pull the trailing plug, rotate the shaft until the=20 tip seal shows up in the first chamber, then make a mark on the starter=20 ring gear. Rotate the engine until the next seal shows up, and make=20 another mark. Count teeth to get the center one, or make the two marked=20 teeth line up vertically. This would eliminate the importance of the=20 spark plug hole location. =20 I'm not sure I understand this; but it suggests the assumption that the=20 TDC position is at the trailing plug hole. - which I don't think is = correct. =20 Al =20 ------=_NextPart_000_0018_01CBD731.1E2D3680 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

> Al

>

 

Let me offer this idea. If you know where the tip seals are, then you =

can derive TDC. Level the base of the engine, and the tip seals should =

line up verically. Pull the trailing plug, rotate the shaft until the =

tip seal shows up in the first chamber, then make a mark on the starter =

ring gear. Rotate the engine until the next seal shows up, and make =

another mark. Count teeth to get the center one, or make the two marked =

teeth line up vertically. This would eliminate the importance of the =

spark plug hole location.

 

I'm not sure I understand this; but it suggests the assumption that the =

TDC position = is at the trailing plug hole. - which I don't think is correct.

 

Al

 

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