Return-Path: Received: from [65.173.216.71] (HELO mtasmtp1-clev.cle.ms.philips.com) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 384583 for lml@lancaironline.net; Mon, 30 Aug 2004 10:07:18 -0400 Received-SPF: none receiver=logan.com; client-ip=65.173.216.71; envelope-from=Rob.Logan@Philips.com Received: from picker.com ([149.59.192.105]) by mtasmtp1-clev.cle.ms.philips.com (Lotus Domino Release 5.0.11) with SMTP id 2004083010061365:62750 ; Mon, 30 Aug 2004 10:06:13 -0400 Received: from [149.59.200.4] (HELO Philips.com) by picker.com (CommuniGate Pro SMTP 3.3b1) with ESMTP id 16597179 for lml@lancaironline.net; Mon, 30 Aug 2004 10:06:46 -0400 Message-ID: <4133344C.2040600@Philips.com> Date: Mon, 30 Aug 2004 10:06:04 -0400 From: Rob Logan Reply-To: Rob@Logan.com User-Agent: Mozilla Thunderbird 0.5 (X11/20040214) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Lancair Mailing List Subject: Re: [LML] Engine Cooling References: In-Reply-To: X-MIMETrack: Itemize by SMTP Server on mtasmtp1-clev/P/SERVER/PHILIPS-CLE(Release 5.0.11 |July 24, 2002) at 08/30/2004 10:06:13 AM, Serialize by Router on mtasmtp1-clev/P/SERVER/PHILIPS-CLE(Release 5.0.11 |July 24, 2002) at 08/30/2004 10:06:44 AM, Serialize complete at 08/30/2004 10:06:44 AM Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=us-ascii; format=flowed I'm no expert, and after consulting a few the two non-std things I did are: 1) cut a slot in front of #5 http://rob.com/lancair/2003.08/DSCN6346.jpg 2) cut a slot in behind #2 http://rob.com/lancair/2003.08/DSCN6345.jpg the idea is to get air around the cyl where the ribs become short. my notes from the APS class have Walter claiming most of the air escapes from the top cowl via the prop hole... but I can't see that as an issues in the lancair design.. once the gami spread is minimized, one knows the torque between cyls is minimized, so the CHT delta is cooling air imbalance between cyls.. so its not necessarily total air leakage, but directing the air you have evenly between all your cyls.. ie: direct as much air down your hottest cyl and the others should be fine. humbly, Rob