X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao106.cox.net ([68.230.241.40] verified) by logan.com (CommuniGate Pro SMTP 5.3.5) with ESMTP id 4215723 for flyrotary@lancaironline.net; Fri, 09 Apr 2010 12:29:39 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.40; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao106.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100409162852.MYTE1296.fed1rmmtao106.cox.net@fed1rmimpo02.cox.net> for ; Fri, 9 Apr 2010 12:28:52 -0400 Received: from BigAl ([72.192.128.205]) by fed1rmimpo02.cox.net with bizsmtp id 3UUr1e00F4S1t5C04UUro1; Fri, 09 Apr 2010 12:28:51 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.1 cv=KqzZVGv1/pIBe+XbL3gCBfL8vaFXECOST7Bs1vfp5Gs= c=1 sm=1 a=PyNjkaOVL4wA:10 a=Vegc0WxVmH5BHtpNDyThtA==:17 a=Ia-xEzejAAAA:8 a=kviXuzpPAAAA:8 a=N96Mw9yrF3ne7ia0EVUA:9 a=vhzGj__XtbLbIBYiK_wBuDC2714A:4 a=wPNLvfGTeEIA:10 a=EzXvWhQp4_cA:10 a=4vB-4DCPJfMA:10 a=YZ7Lcu6mUkVk4ZRA:21 a=JB7jIF1eKI022K1Y:21 a=Wz6TEpEGQ6nRMdaA4EEA:7 a=hAtqHA052PoQGLvo6Fosg9dC-PkA:4 a=Vegc0WxVmH5BHtpNDyThtA==:117 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Tangential muffler Date: Fri, 9 Apr 2010 09:29:12 -0800 Message-ID: <2CAB6CB3026A443382F273E1B77E78BF@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0028_01CAD7C7.1D3D49A0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Importance: Normal Thread-Index: AcrX+/Yn/RnHdsYrTqGNnWWLTWirswADd3sg In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0028_01CAD7C7.1D3D49A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I=92d expect it to be very effective. Is the total area of the slots =3D or > than the x-section of the 2 = =BD=94 pipe? Is the P-port less sensitive to exhaust back pressure? =20 Al =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle Sent: Friday, April 09, 2010 7:47 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Tangential muffler =20 Al,=20 =20 The slotted tube exits through the aft end of the muffler. It is 2-1/2" = the whole way. I slotted it after I was unable to drill holes through the = SS. Cutting 1" slits was very easy. After making the cuts, I took a hammer = and chisel and made a "V" shaped indent on one side of the cut to increase = the exit area provided by each cut and to encourage the exhaust gasses to = flow toward the exit. Seems to be working. I'll take some sound = measurements a little later on. =20 Mark On Fri, Apr 9, 2010 at 11:13 AM, Al Gietzen wrote: I should make it clear that my tangential muffler uses a slotted tube = that runs down through the length of the 5" tube. This tube is also inconel = and is welded to both ends, thereby adding strength to the flat ends. I utilized Lynn's coupling design to allow for movement between the = muffler and the engine. =20 =20 Mark; This is interesting. Would you care to give a bit more info =96 or = perhaps provide a sketch? Where is the exit from the muffler? Does the exhaust = exit through the slotted tube? How big is the tube? =20 Al =20 ------=_NextPart_000_0028_01CAD7C7.1D3D49A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I’d expect it to be very = effective.

Is the total area of the slots = =3D or > than the x-section of the 2 =BD” pipe?

Is the P-port less sensitive to = exhaust back pressure?

Al

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle
Sent: Friday, April 09, = 2010 7:47 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: Tangential muffler

Al,

The slotted tube exits through the aft end of = the muffler. It is 2-1/2" the whole way. I slotted it after = I was unable to drill holes through the SS. Cutting 1" slits was = very easy. After making the cuts, I took a hammer and chisel and made a "V" shaped indent on one side of the cut to increase the exit = area provided by each cut and to encourage the exhaust gasses to flow toward = the exit. Seems to be working. I'll take some sound measurements = a little later on.

Mark

On Fri, Apr 9, 2010 at 11:13 AM, Al Gietzen = <ALVentures@cox.net> = wrote:

I should make it clear that my tangential = muffler uses a slotted tube that runs down through the length of the 5" tube. = This tube is also inconel and is welded to both ends, thereby adding strength = to the flat ends. I utilized Lynn's coupling design to allow for movement between the muffler and the engine.

Mark;

This is interesting. Would you care to give a bit more info – or = perhaps provide a sketch? Where is the exit from the muffler? Does the exhaust = exit through the slotted tube? How big is the tube?

Al

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