Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Tue, 19 Oct 2004 09:42:56 -0400 Message-ID: X-Original-Return-Path: Received: from mta-out-1.udlp.com ([207.109.1.8] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 478199 for lml@lancaironline.net; Tue, 19 Oct 2004 01:17:21 -0400 Received-SPF: pass receiver=logan.com; client-ip=207.109.1.8; envelope-from=Christopher.Zavatson@udlp.com Received: from asdmngwia.mpls.udlp.com (asdmngwia.mpls.udlp.com [10.1.62.22]) by mta-out-1.udlp.com (8.12.10/8.12.10) with ESMTP id i9J3OeGu009418 for ; Mon, 18 Oct 2004 22:24:40 -0500 Received: from DM-MN-06-MTA by asdmngwia.mpls.udlp.com with Novell_GroupWise; Tue, 19 Oct 2004 00:16:50 -0500 X-Original-Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 X-Original-Date: Tue, 19 Oct 2004 00:16:40 -0500 From: "Christopher Zavatson" X-Original-To: Subject: [LML] Re: Keeping Ada Cooling Cool Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Guinevere: 2.0.15 ; United Defense LP Gary, << A problem with a plenum is that the space above the front cylinders is very limited and it...>> That space is indeed very limited. You have to complete your vertical expansion long before you get to the first cylinders. On the 320/360 it can be done by the time you get to the forward engine baffle that reside behind the flywheel. << Eliminating the leakage is a good thing, but a carefully fitted rubber flap against the cowl will do that. >> You might find NASA report 3405, "An Experimental Investigation of the Aerodynamics and Cooling of a Horizontally-Opposed Air-Cooled Aircraft Engine Installation" interesting reading. It is a reference in the cooling spreadsheet brought to our attention by Jerry Fisher. The magnitude of leakage past the stock baffle system in Aztec they used is mind boggling. The report is available at http://ntrs.nasa.gov Chris Zavatson