X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from rwcrmhc14.comcast.net ([216.148.227.154] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2150084 for flyrotary@lancaironline.net; Sat, 30 Jun 2007 12:40:21 -0400 Received-SPF: none receiver=logan.com; client-ip=216.148.227.154; envelope-from=techwelding@comcast.net Received: from dell (c-69-139-116-211.hsd1.ky.comcast.net[69.139.116.211]) by comcast.net (rwcrmhc14) with SMTP id <20070630163943m1400nf2qqe>; Sat, 30 Jun 2007 16:39:43 +0000 Message-ID: <000e01c7bb35$320de260$d3748b45@dell> From: "Ed Klepeis" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Noise Date: Sat, 30 Jun 2007 11:39:14 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 Dear Fred Look at my web site you will see what you are talking about it was made but never tested out. techwelding.com. Regards Ed Klepeis ----- Original Message ----- From: "Fred Osborn" To: "Rotary motors in aircraft" Sent: Saturday, June 30, 2007 10:35 AM Subject: [FlyRotary] Noise > Yes, a long taper, a fish mouth, or a fish tail cut at the end of the > exhaust pipe will help break up the harmonics and resonances of the > exhaust pulse. Not a lot quieter but definitely more mellow. > > Fred O. > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html >