X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from omc2-s39.bay6.hotmail.com ([65.54.249.49] verified) by logan.com (CommuniGate Pro SMTP 4.3.6) with ESMTP id 1059569 for flyrotary@lancaironline.net; Mon, 18 Jul 2005 13:05:48 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.249.49; envelope-from=lors01@msn.com Received: from hotmail.com ([64.4.51.94]) by omc2-s39.bay6.hotmail.com with Microsoft SMTPSVC(6.0.3790.211); Mon, 18 Jul 2005 10:05:02 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 18 Jul 2005 10:05:02 -0700 Message-ID: Received: from 64.4.51.220 by BAY107-DAV22.phx.gbl with DAV; Mon, 18 Jul 2005 17:05:01 +0000 X-Originating-IP: [64.4.51.220] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Startic Timing / TDC Date: Mon, 18 Jul 2005 13:04:58 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0188_01C58B99.4D1CAFF0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0011.1703 Seal-Send-Time: Mon, 18 Jul 2005 13:04:58 -0400 X-OriginalArrivalTime: 18 Jul 2005 17:05:02.0283 (UTC) FILETIME=[D624A1B0:01C58BBA] Return-Path: lors01@msn.com This is a multi-part message in MIME format. ------=_NextPart_000_0188_01C58B99.4D1CAFF0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable All good advice from Lynn on finding TDC and other timing points. Another thing to consider is that the "static timing" on the EC2 (and = possibly others) has nothing to do with the time that the spark occurs = on a running engine. It is just a reference point for the computer = which uses a bunch of factors to determine when to make the spark. The = 2 pointed trigger (on 2nd gen engines) should line up with the sensor = when the crank is at 35 deg BTDC on Rotor 1 for EC2 controllers. I don't know what other controllers require. Tracy In a message dated 7/17/2005 7:55:15 AM Pacific Daylight Time, = Lehanover@aol.com writes: Correction: For example, let us say that you want 25 degrees of total advance.=20 Divide 25 degrees by 3.27 to get 7.64 teeth. Sorry. Lynn E. Hanover ------=_NextPart_000_0188_01C58B99.4D1CAFF0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

All good advice from Lynn on finding TDC and other timing = points.

Another thing to consider is that the "static timing" on the = EC2 (and=20 possibly others) has nothing to do with the time that the spark occurs = on a=20 running engine. It is just a reference point for the computer = which uses a=20 bunch of factors to determine when to make the spark. The 2 = pointed=20 trigger (on 2nd gen engines) should line up with the sensor when the = crank is at=20 35 deg BTDC on Rotor 1 for EC2 controllers.

I don't know what other controllers require.

Tracy

In a message dated 7/17/2005 7:55:15 AM Pacific Daylight Time, Lehanover@aol.com writes:

Correction:

For example, let us say that you want 25 degrees of total = advance.=20

Divide 25 degrees by 3.27 to get 7.64 = teeth.

Sorry.

Lynn E. Hanover

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