X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imr-da02.mx.aol.com ([205.188.105.144] verified) by logan.com (CommuniGate Pro SMTP 5.3.10) with ESMTP id 4586143 for flyrotary@lancaironline.net; Sat, 20 Nov 2010 07:38:36 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.105.144; envelope-from=Lehanover@aol.com Received: from imo-ma03.mx.aol.com (imo-ma03.mx.aol.com [64.12.78.138]) by imr-da02.mx.aol.com (8.14.1/8.14.1) with ESMTP id oAKCbtvH004441 for ; Sat, 20 Nov 2010 07:37:55 -0500 Received: from Lehanover@aol.com by imo-ma03.mx.aol.com (mail_out_v42.9.) id q.fd7.371c01d (56012) for ; Sat, 20 Nov 2010 07:37:51 -0500 (EST) Received: from magic-d19.mail.aol.com (magic-d19.mail.aol.com [172.19.155.135]) by cia-md07.mx.aol.com (v129.7) with ESMTP id MAILCIAMD076-dacc4ce7c11f6b; Sat, 20 Nov 2010 07:37:51 -0500 From: Lehanover@aol.com Message-ID: <18a883.278d453c.3a191b1f@aol.com> Date: Sat, 20 Nov 2010 07:37:51 EST Subject: Re: [FlyRotary] Tangential Muffler To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_18a883.278d453c.3a191b1f_boundary" X-Mailer: 9.0 Security Edition for Windows sub 5382 X-AOL-IP: 72.187.199.116 X-Spam-Flag:NO X-AOL-SENDER: Lehanover@aol.com --part1_18a883.278d453c.3a191b1f_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 11/20/2010 6:33:32 A.M. Eastern Standard Time, msteitle@gmail.com writes: The positive news is that I picked up 10-12 mph on top speed! So, it confirms my suspicions that the tangential muffler is too restrictive for my engine. While definitely not optimal, the 3-into-1 design is clearly better than the tangential muffler when it comes to making power. So, my plan is to build another exhaust from 625 inconel, making all three runners 31.5". I haven't decided what I will use for a muffler. I'll report back when I have more data. Mark Equally spaced pulses from identical length tubes joined at the same angles, while still loud will sound less irritating, and might be easier to muffle. Uneven lengths and angles sound like fingernails on a black board. Lynn E. Hanover --part1_18a883.278d453c.3a191b1f_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 11/20/2010 6:33:32 A.M. Eastern Standard Time,=20 msteitle@gmail.com writes:

The positive news is that I picked up 10-12 mph on top speed! = ;So,=20 it confirms my suspicions that the tangential muffler is too restrictive= for=20 my engine. While definitely not optimal, the 3-into-1 design is cl= early=20 better than the tangential muffler when it comes to making power. = =20 =20

So, my plan is to build another exhaust from 625 inconel, making al= l=20 three runners 31.5". I haven't decided what I will use for a muffl= er.=20 I'll report back when I have more data.

Mark

Equally spaced pulses from identical length tubes joined at the same= =20 angles, while still loud will sound less irritating, and might be easier= to=20 muffle. Uneven lengths and angles sound like fingernails on a black= board.=20

Lynn E. Hanover

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