X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mx2.netapp.com ([216.240.18.37] verified) by logan.com (CommuniGate Pro SMTP 5.4.2) with ESMTPS id 5172550 for flyrotary@lancaironline.net; Tue, 25 Oct 2011 15:43:45 -0400 Received-SPF: softfail receiver=logan.com; client-ip=216.240.18.37; envelope-from=echristley@nc.rr.com X-IronPort-AV: E=Sophos;i="4.69,405,1315206000"; d="scan'208";a="592257393" Received: from smtp2.corp.netapp.com ([10.57.159.114]) by mx2-out.netapp.com with ESMTP; 25 Oct 2011 12:42:38 -0700 Received: from [10.62.16.167] (ernestc-laptop.hq.netapp.com [10.62.16.167]) by smtp2.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id p9PJgaJB028716 for ; Tue, 25 Oct 2011 12:42:37 -0700 (PDT) Message-ID: <4EA710D9.5060705@nc.rr.com> Date: Tue, 25 Oct 2011 15:41:13 -0400 From: Ernest Christley Reply-To: echristley@nc.rr.com User-Agent: Thunderbird 2.0.0.24 (X11/20100623) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] A Simple Muffler for the Rotary References: In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Isn't this very similar to the one that brought Mistral's Cherokee test plane down? I wonder how it would perform if there were four reinforced 1/2" holes drilled in the front transition, such that a small amount of exhaust energy could escape that way, and ram pressure could pull in cool air to mix with the hot, supersonic exhaust. Jeff Whaley wrote: > > Hello All: > > I=92ve attached a hand sketch for a =93simple=94 muffler for the rotary= =2E > > Parts all standard from Burns Stainless Steel (304). > > Note there are holes right at the transition outlet flare to ease > pressure at that point. > > Inlet has a deflector to force exhaust to exit through multiple holes > in the tailpipe insert. > > =85 let me know your thoughts. > > Jeff > > This message, and the documents attached hereto, is intended only for > the addressee and may contain privileged or confidential information. > Any unauthorized disclosure is strictly prohibited. If you have > received this message in error, please notify us immediately so that > we may correct our internal records. Please then delete the original > message. Thank you. > -----------------------------------------------------------------------= - > > -----------------------------------------------------------------------= - > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/L= ist.html > =20