X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-dupuy.atl.sa.earthlink.net ([209.86.89.62] verified) by logan.com (CommuniGate Pro SMTP 6.0.7) with ESMTP id 6545634 for lml@lancaironline.net; Fri, 18 Oct 2013 08:42:18 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.62; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=qNyLV4ThQcdQSUr/W+2q2R4nLaJPnG9AuxAq3fdc0NmWAqg3gF1iLr9kEo1RYITy; h=Received:Content-Type:Mime-Version:Subject:From:In-Reply-To:Date:Content-Transfer-Encoding:Message-Id:References:To:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [70.105.248.126] (helo=[192.168.1.24]) by elasmtp-dupuy.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1VX9N7-0003DY-Nf for lml@lancaironline.net; Fri, 18 Oct 2013 08:41:42 -0400 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Apple Message framework v1085) Subject: Re: [LML] Re: Hot TITs on X country leg. LIVP From: Colyn Case In-Reply-To: Date: Fri, 18 Oct 2013 08:41:40 -0400 Content-Transfer-Encoding: quoted-printable Message-Id: References: To: "Lancair Mailing List" X-Mailer: Apple Mail (2.1085) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da9400ce6ddec1567be03a8e748ccb2d6aded350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 70.105.248.126 If you have a turbo with an automatic waste gate, which is the case = Craig was addressing, the fuel/air ratio is NOT changing as you climb. = Also typically you don't have as much cooling available in climb as in = cruise so you want less heat going to the cylinder walls. This is = aggravated by thinner air as you get higher. Rich mixture =3D slower = burn =3D lower intra cylinder pressures =3D less heat transfer to the = cylinder walls. On Oct 18, 2013, at 7:53 AM, Keith Smith wrote: Question about climbing "full rich". Would it not make sense to = maintain sea-level EGT's through the climb, rather than truly full rich = all the way up to 17K? As you climb higher, 'full rich' is a whole lot = richer than the mixture you had during takeoff. This is something I = learned through John Deakin's Pelican Perch articles a few years back = when I first got the Lancair. I usually 're-lean' every 1000ft or so = during my climbs to maintain around 1320 EGT. Keith LNC2 N360JH