Return-Path: Received: from [24.25.9.102] (HELO ms-smtp-03-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.1.5) with ESMTP id 2648490 for flyrotary@lancaironline.net; Thu, 23 Oct 2003 15:21:56 -0400 Received: from ms-mss-03-ce0-1 ([10.10.1.39]) by ms-smtp-03-eri0.southeast.rr.com (8.12.10/8.12.7) with ESMTP id h9NJLphf004816 for ; Thu, 23 Oct 2003 15:21:51 -0400 (EDT) Received: from southeast.rr.com (localhost [127.0.0.1]) by ms-mss-03.southeast.rr.com (iPlanet Messaging Server 5.2 HotFix 1.12 (built Feb 13 2003)) with ESMTP id <0HN800LK55SF8J@ms-mss-03.southeast.rr.com> for flyrotary@lancaironline.net; Thu, 23 Oct 2003 15:21:51 -0400 (EDT) Received: from [10.10.1.25] by ms-mss-03.southeast.rr.com (mshttpd); Thu, 23 Oct 2003 15:21:51 -0400 Date: Thu, 23 Oct 2003 15:21:51 -0400 From: echristley@nc.rr.com Subject: Re: [FlyRotary] cooling air flow path (was:Re: EWP check valves) To: Rotary motors in aircraft Reply-to: echristley@nc.rr.com Message-id: <54bc01551bc2.551bc254bc01@southeast.rr.com> MIME-version: 1.0 X-Mailer: iPlanet Messenger Express 5.2 HotFix 1.12 (built Feb 13 2003) Content-type: text/plain; charset=us-ascii Content-language: en Content-transfer-encoding: 7BIT Content-disposition: inline X-Accept-Language: en Priority: normal X-Virus-Scanned: Symantec AntiVirus Scan Engine > You mentioned the exit path as near the end of the turtleback. Is > this > on a Dyke Delta? I don't know about the Delta, but on most > conventional > airframes the top of the fuse. behind the canopy is actually a > *high* > pressure area. Have you checked this out with the designer of the > airframe? > Charlie > former owner of a Thorp T-18, a design that has the cockpit fresh > air > input cut into the *back* of the canopy. > > The Delta is a flying wing design, ie the fuselage is airfoil shaped and actually carries 1/3 of the air load. My assumption was that as an airfoil, it would have airfoil characteristics. NACA studies indicated that the lowest pressure point on an airfoil was at the 70% MAC point.