X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost04.isp.att.net ([204.127.217.104] verified) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTP id 2504781 for flyrotary@lancaironline.net; Sun, 25 Nov 2007 22:16:41 -0500 Received-SPF: pass receiver=logan.com; client-ip=204.127.217.104; envelope-from=ceengland@bellsouth.net Received: from [192.168.10.5] (adsl-152-71-226.jan.bellsouth.net[70.152.71.226]) by bellsouth.net (frfwmhc04) with ESMTP id <20071126031603H0400k3ioue>; Mon, 26 Nov 2007 03:16:04 +0000 X-Originating-IP: [70.152.71.226] Message-ID: <474A3A74.40402@bellsouth.net> Date: Sun, 25 Nov 2007 21:16:04 -0600 From: Charlie England User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.9) Gecko/20071030 SeaMonkey/1.1.6 MIME-Version: 1.0 To: flyrotary Subject: exhausting work Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit While re-perusing an old article to answer a question on another list, I noticed something about coanda nozzles that might be of interest to rotary fans. It mentions that while there is no performance increase, it does seem to 'mellow' the exhaust sound. I wonder if this might survive the rotary pulses better than other pulse breaking techniques & help take the edge off the rotary bark. (Although it might be a moot point if everyone adopts Dennis Haverlauh's system for the Renesis.) http://cafefoundation.org/v2/pdf_cafe_reports/EPG%20PART%20IV.pdf Charlie