Return-Path: Received: from rokland5.awh.us ([67.15.10.31] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP-TLS id 777508 for flyrotary@lancaironline.net; Wed, 09 Mar 2005 20:24:50 -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]:33761 helo=quail) by rokland5.awh.us with smtp (Exim 4.43) id 1D9CPD-0005Nn-My for flyrotary@lancaironline.net; Wed, 09 Mar 2005 19:24:03 -0600 Date: Wed, 9 Mar 2005 18:24:02 -0700 From: Bob White To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Mixture Settings Message-Id: <20050309182402.79ba954d.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=ISO-8859-1 Content-Transfer-Encoding: quoted-printable 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: Thanks Bill, So my belief that I need to run richer for the high power settings on the rotary is incorrect? I have Tracy's EC2 so will have to set the operating mixture. That reminds me, I haven't bought the bung for the O2 sensor yet (for the EM2). Bob W. On Wed, 09 Mar 2005 19:50:50 -0500 WRJJRS@aol.com wrote: > Bob,=20 > Several things here! First, 50=B0 rich of peak is standard for Lycosauru= ses. Tracy has been getting much better economy 50=B0 lean of peak which th= e ROTARY likes just fine. EFI on the rotary can be set up in various ways. = If you run a system with a O2 sensor standard it leans itself to at or near= stoichiometric mixture. No problem with air in the exhaust. Mistral a comp= any certifying the rotary, has been using lean-of-peak mixtures with it's d= igital EFI all along to improve mileage/efficiency. Also no trouble. If you= run Tracy's EFI controller you could set it up rich enough to cause proble= ms but the engine would be no where near peak power. > Bill Jepson >=20 > In a message dated 3/9/2005 7:02:51 PM Eastern Standard Time, Bob White <= bob@bob-white.com> writes: >=20 > > > >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. =A0If on the rich side, there would be extra fuel in the > >exhaust. =A0Am I wrong in this assumption, or is the proper setting close > >enough to peak =A0that it doesn't make much difference? =A0One of these > >days I'm going to need to know this stuff. =A0:) > > > >Thanks, > >Bob W. > > > > > >On Wed, 09 Mar 2005 18:37:42 -0500 > >WRJJRS@aol.com wrote: > > > > > >> Georges, and Gail, > >> =A0On 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 un= less there is too rich a mixture to begin with.=20 > >> Bill Jepson > > > >--=20 > >http://www.bob-white.com > >N93BD - Rotary Powered BD-4 (real soon) > > > >>> =A0Homepage: =A0http://www.flyrotary.com/ > >>> =A0Archive: =A0 http://lancaironline.net/lists/flyrotary/List.html > > >=20 > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html >=20 >=20 --=20 http://www.bob-white.com N93BD - Rotary Powered BD-4 (real soon)