Return-Path: Received: from rokland5.awh.us ([67.15.10.31] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP-TLS id 777413 for flyrotary@lancaironline.net; Wed, 09 Mar 2005 19:03:41 -0500 Received-SPF: none receiver=logan.com; client-ip=67.15.10.31; envelope-from=bob@bob-white.com Received: from bgp01386375bgs.brodwy01.nm.comcast.net ([68.35.160.229]:33627 helo=quail) by rokland5.awh.us with smtp (Exim 4.43) id 1D9B8e-0002C2-Lp for flyrotary@lancaironline.net; Wed, 09 Mar 2005 18:02:52 -0600 Date: Wed, 9 Mar 2005 17:02:51 -0700 From: Bob White To: "Rotary motors in aircraft" Subject: Mixture Settings Message-Id: <20050309170251.7cf14fe1.bob@bob-white.com> In-Reply-To: References: X-Mailer: Sylpheed version 1.9.4 (GTK+ 2.4.9; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Antivirus-Scanner: Clean mail though you should still use an Antivirus X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - rokland5.awh.us X-AntiAbuse: Original Domain - lancaironline.net X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - bob-white.com X-Source: X-Source-Args: X-Source-Dir: Hi Bill, I've had the impression that the mixture should be set on the rich side of peak for TO and climb and on the lean side of peak for best economy cruise. If on the rich side, there would be extra fuel in the exhaust. Am I wrong in this assumption, or is the proper setting close enough to peak that it doesn't make much difference? One of these days I'm going to need to know this stuff. :) Thanks, Bob W. On Wed, 09 Mar 2005 18:37:42 -0500 WRJJRS@aol.com wrote: > Georges, and Gail, > On this issue you are incorrect, when we lean the mixture using EFI we are looking for '0' oxygen remaining or complete combustion. Adding air well after the exhaust exits the ports will not "afterburn" the mixture unless there is too rich a mixture to begin with. > Bill Jepson -- http://www.bob-white.com N93BD - Rotary Powered BD-4 (real soon)