X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from lrcmmta11-web.windstream.net ([166.102.165.49] verified) by logan.com (CommuniGate Pro SMTP 5.3.5) with ESMTP id 4193360 for flyrotary@lancaironline.net; Fri, 02 Apr 2010 10:54:21 -0400 Received-SPF: pass receiver=logan.com; client-ip=166.102.165.49; envelope-from=jrhopkins@windstream.net Return-Path: X-WS-COS: WSOB806 X-Cloudmark-Category: Undefined:Undefined X-Cloudmark-Analysis: v=1.0 c=1 a=iPRmpaxiJdgA:10 a=IkcTkHD0fZMA:10 a=tdpRzEqr83olY2F3qpUA:9 a=vbxmvHfiCjkxVQb-x7_VL_RcB8AA:4 a=QEXdDO2ut3YA:10 X-Cloudmark-Score: 0 Received: from [10.135.32.118] ([10.135.32.118:44714] helo=ispmxfep12-z01) by lrcmmta11 (envelope-from ) (ecelerity 2.2.2.45 r()) with ESMTP id 54/29-19480-9F406BB4; Fri, 02 Apr 2010 09:53:45 -0500 Message-ID: <20100402095345.9M3KC.952612.root@ispmxfep12-z01> Date: Fri, 2 Apr 2010 7:53:45 -0700 From: To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Tuned lengths Cc: Al Gietzen In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) Sensitivity: Normal X-Originating-IP: 75.89.242.34 X-Auth-IP: 75.89.242.34 somehow i think that a tuned intake is irrelevant. when i look at the intakes all i see is turbulence with all the curves. air is a liquid, just like water, and it wants to go straight. is not turbulence going into the engine intake orfice a good thing for mixing the fuel spray? it would seem that the only real help would be compressing the air, and that helps exhaust noise as well if you use a turbocharger. also, why complicate things by using two or three air valves when one in the large intake will do. is it hard on a rotary to have slightly different manifold pressures to 2 or more rotars? devils advocate am i. thanks