Return-Path: Sender: (Marvin Kaye) To: lml Date: Sun, 19 May 2002 17:56:53 -0400 Message-ID: X-Original-Return-Path: Received: from smtprelay3.dc3.adelphia.net ([24.50.78.6] verified) by logan.com (CommuniGate Pro SMTP 4.0b1) with ESMTP id 1241807 for lml@lancaironline.net; Sun, 19 May 2002 12:21:47 -0400 Received: from worldwinds ([207.175.254.66]) by smtprelay3.dc3.adelphia.net (Netscape Messaging Server 4.15) with SMTP id GWD9G500.N0L for ; Sun, 19 May 2002 12:21:41 -0400 From: "Gary Casey" X-Original-To: "lancair list" Subject: exhaust pipe configuration X-Original-Date: Sun, 19 May 2002 09:18:07 -0700 X-Original-Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 <> Jim Ayers of our local EAA chapter did a bit of work on is LOM-powered RV. His conclusion was that the exhaust plume is just as solid an obstruction to air flow as a metal deflector. Thus, when the pipe is directing the exhaust away from the aircraft you have to assume the frontal area increased not by just the pipe, but by the plume that extends for some distance away from it. Another comment on the deflected exhaust pipe is that the length of the bend is not sufficient to significantly change the direction of flow, but will cause significant turbulence right at the outlet - which might explain the exhaust stains on the outside of the pipe. Gary Casey ES project