Return-Path: Sender: (Marvin Kaye) To: lml Date: Mon, 17 Mar 2003 12:56:00 -0500 Message-ID: X-Original-Return-Path: Received: from [203.59.230.190] (HELO ccmc_n1.mediquest.net) by logan.com (CommuniGate Pro SMTP 4.1b1) with ESMTP id 2060044 for lml@lancaironline.net; Mon, 17 Mar 2003 10:57:18 -0500 Received: by ccmc_n1.mediquest.net with Internet Mail Service (5.5.2653.19) id ; Mon, 17 Mar 2003 23:58:46 +0800 X-Original-Message-ID: <7DCA99A8C21ED511947A080009EECC120B7E40@ccmc_n1.mediquest.net> From: Michael Aarons X-Original-To: "Mailing List Lancair (E-mail)" Subject: LNC2 360 RAM AIR X-Original-Date: Mon, 17 Mar 2003 23:58:42 +0800 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Hi All, I'm in the process of rebuilding the lower cowl and ram air induction. Several people have made comments on the size of the opening for the ram air induction. The standard shape is like a squashed trumpet, with the cross sectional area decreasing as the air travels inwards. Some say the hole can be smaller and round and that will work more efficiently. Opening size same as fuel controller. Is there any formula? Is there a speed at which the ram air effect becomes constant? Any help/advice on this matter would be most appreciated. Michael LNC2 VH-RMU