X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1006043 for flyrotary@lancaironline.net; Sat, 18 Jun 2005 10:30:13 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.72; envelope-from=13brv3@bellsouth.net Received: from ibm68aec.bellsouth.net ([65.6.194.9]) by imf24aec.mail.bellsouth.net with ESMTP id <20050618142929.OWJN26489.imf24aec.mail.bellsouth.net@ibm68aec.bellsouth.net> for ; Sat, 18 Jun 2005 10:29:29 -0400 Received: from rd ([65.6.194.9]) by ibm68aec.bellsouth.net with ESMTP id <20050618142929.LUIU29052.ibm68aec.bellsouth.net@rd> for ; Sat, 18 Jun 2005 10:29:29 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: small muffler suggestions for single rotor? Date: Sat, 18 Jun 2005 09:29:29 -0500 Message-ID: <000001c57412$235e8ec0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C573E8.3A8AD0B0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C573E8.3A8AD0B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit If you consider a container of 6" dia and 24" long physically acceptable, the muffler is built around it. Next, in the single rotor is only one pipe input, this input pipe enters the container tangential on one end. The exit pipe is located on the other end of the container rectanular to the container C/L. The exit pipe must be smaller then the inlet pipe since the gases have less volume because of the energy loss in the container. Thanks for the great explanation Richard. This sounds too easy not to try. About the longest space I have is 18", so maybe I'd try to go with a slightly larger diameter to make up the area. Do you have any suggestion for the thickness of the metal, and did you use 321, or 304 stainless? Best I can figure, 304 is probably OK, as long as it's thick enough. Heck, in cars, they often use mild steel, but quite thick and heavy. Thanks, Rusty (post office holding my oil pump hostage) ------=_NextPart_000_0001_01C573E8.3A8AD0B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
 If you consider a container = of 6" dia=20 and 24" long physically acceptable, the muffler is built around it. = Next, in the=20 single rotor is only one pipe input, this input pipe enters the = container=20 tangential on one end. The exit pipe is located on the other end of the=20 container rectanular to the container C/L. The exit pipe must be smaller = then=20 the inlet pipe since the gases have less volume because of the energy = loss in=20 the container.  
 
Thanks for the great explanation = Richard.  This=20 sounds too easy not to try.  About the longest space I have is 18", = so=20 maybe I'd try to go with a slightly larger diameter to make up=20 the area.   
 
Do you have any suggestion for the thickness = of the=20 metal, and did you use 321, or 304 stainless?  Best I can figure, = 304 is=20 probably OK, as long as it's thick enough.   Heck, in cars, = they often=20 use mild steel, but quite thick and=20 heavy.  
 
Thanks,
Rusty (post office holding my oil pump=20 hostage)
 
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