X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao107.cox.net ([68.230.241.39] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTP id 2340165 for flyrotary@lancaironline.net; Wed, 19 Sep 2007 14:08:30 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.39; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao107.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20070919180752.UWTE12354.fed1rmmtao107.cox.net@fed1rmimpo01.cox.net> for ; Wed, 19 Sep 2007 14:07:52 -0400 Received: from BigAl ([72.192.143.193]) by fed1rmimpo01.cox.net with bizsmtp id qJ7s1X00G4AaN600000000; Wed, 19 Sep 2007 14:07:52 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Strange Ignition? Date: Wed, 19 Sep 2007 11:08:13 -0800 Message-ID: <000201c7faf0$6d572070$6401a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0003_01C7FAAD.5F33E070" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 This is a multi-part message in MIME format. ------=_NextPart_000_0003_01C7FAAD.5F33E070 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit I wondered if perhaps one issue was that I was doing the ignition check static, on the ground; where the combination of RPM and MAP would be different than in the air. But on checking with Tracy's spreadsheet on the timing settings, over a fairly broad range above about 4900 the timing is (should be) in the range of 26 to 28 degrees BTDC. Al ------=_NextPart_000_0003_01C7FAAD.5F33E070 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I wondered if perhaps one issue was that I was doing the ignition check = static, on the ground; where the combination of RPM and MAP would be different = than in the air.  But on checking with Tracy’s spreadsheet on the timing settings, over a fairly = broad range above about 4900 the timing is (should be) in the range of 26 to = 28 degrees BTDC.

 

Al

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