X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 24 Dec 2005 02:30:36 -0500 Message-ID: X-Original-Return-Path: Received: from secure5.liveoakhosting.com ([64.49.254.21] verified) by logan.com (CommuniGate Pro SMTP 5.0.4) with ESMTPS id 894218 for lml@lancaironline.net; Fri, 23 Dec 2005 17:45:48 -0500 Received-SPF: none receiver=logan.com; client-ip=64.49.254.21; envelope-from=walter@advancedpilot.com Received: (qmail 22092 invoked from network); 23 Dec 2005 16:45:03 -0600 Received: from ip68-108-237-23.br.no.cox.net (HELO ?10.0.1.4?) (68.108.237.23) by rs5.liveoakhosting.com with SMTP; 23 Dec 2005 16:45:03 -0600 Mime-Version: 1.0 (Apple Message framework v623) In-Reply-To: References: Content-Type: text/plain; charset=US-ASCII; format=flowed X-Original-Message-Id: Content-Transfer-Encoding: 7bit From: Walter Atkinson Subject: Re: [LML] Re: Where has all the power gone? X-Original-Date: Fri, 23 Dec 2005 16:45:02 -0600 X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.623) John: ** You see, I just said that there was no timing change at > 26" MAP, so, then, a stronger spark is not going to cause a power loss.** Again, that all depends. Assume takeoff power. Let's assume a timing of 22 degrees with a magneto. Now, assume a timing of 22 degrees with a very hot spark from an electronic ignition. The two will NOT result in the same *effective* timing or thetaPP. It is quite likely in ANY aircraft engine so set up that the earlier thetaPP of the second example WILL have less HP and higher stress on the engine. That is not open for debate. It is a measurable effect we can demonstrate repeatedly. If that is not what we are talking about, please help me understand so we can be more accurate in the discussion. Walter