Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 551698 for flyrotary@lancaironline.net; Tue, 30 Nov 2004 17:32:57 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.72; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041130223223.GQFH2421.imf24aec.mail.bellsouth.net@rd> for ; Tue, 30 Nov 2004 17:32:23 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] New Muffler Design Date: Tue, 30 Nov 2004 16:32:28 -0600 Message-ID: <000701c4d72c$7914b6b0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0008_01C4D6FA.2E7A46B0" 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 V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0008_01C4D6FA.2E7A46B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable The mufflers consider of two 2" dia tubes 4' long with sound attenuating discs inserted. Each muffler hangs off of my two header pipes and = extend back under the fuselage with the exhaust exit dumping behind the cockpit area. =20 =20 Sounds interesting. What are the tubes made of (mild steel, 321 ss, = etc)? Any drawings of the discs? I'd love to eliminate the weight and drag of = the Spintech, but it sure does hold up well. Good luck with the new design. =20 Rusty =20 ------=_NextPart_000_0008_01C4D6FA.2E7A46B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
The mufflers consider of two 2" dia = tubes 4' long=20 with sound attenuating discs inserted.  Each muffler hangs off of = my two=20 header pipes and extend back under the fuselage with the exhaust exit = dumping=20 behind the cockpit area.
 
 
Sounds=20 interesting.  What are the tubes made of (mild steel, 321 ss, = etc)? =20 Any drawings of the discs?  I'd love to eliminate the weight and = drag of=20 the Spintech, but it sure does hold up well.  Good luck = with the new=20 design.
 
Rusty=20  
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