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 386663 for lml@lancaironline.net; Tue, 31 Aug 2004 11:34:01 -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 2004083111325553:63753 ; Tue, 31 Aug 2004 11:32:55 -0400 Received: from [149.59.200.4] (HELO Philips.com) by picker.com (CommuniGate Pro SMTP 3.3b1) with ESMTP id 16597676 for lml@lancaironline.net; Tue, 31 Aug 2004 11:33:28 -0400 Message-ID: <41349A1E.7060601@Philips.com> Date: Tue, 31 Aug 2004 11:32:46 -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: Engine Cooling [cooling drag] 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 08/31/2004 11:32:55 AM, Serialize by Router on mtasmtp1-clev/P/SERVER/PHILIPS-CLE(Release 5.0.11 |July 24, 2002) at 08/31/2004 11:33:27 AM, Serialize complete at 08/31/2004 11:33:27 AM Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=us-ascii; format=flowed > effect on cooling drag as "wasted" air is going through the engine > compartment instead of around it. what is a larger component of "cooling drag"? 1) the front cross section (large dolly parton air exit holes) or 2) the slowing of air going across the engine > The cowl opening on most airplanes, as it turns out, > are larger than they should be! the front holes is free, but to get deltaP one must get rid of the air, and without a dolly parton fixed cowl flap the air won't get out of the cowl... ever walk through an air curtain? won't the air dam up infront of the larger then necessary front air holes as deltaP is reached and zip around the cowl not contributing to #2? Rob