X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from tomcat.al.noaa.gov ([140.172.240.2] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 933471 for flyrotary@lancaironline.net; Thu, 05 May 2005 11:16:07 -0400 Received-SPF: none receiver=logan.com; client-ip=140.172.240.2; envelope-from=bdube@al.noaa.gov Received: from mungo.al.noaa.gov (mungo.al.noaa.gov [140.172.241.126]) by tomcat.al.noaa.gov (8.12.11/8.12.0) with ESMTP id j45FFNqS008289 for ; Thu, 5 May 2005 09:15:23 -0600 (MDT) Message-Id: <6.2.1.2.0.20050505091142.03d886e0@mailsrvr.al.noaa.gov> X-Mailer: QUALCOMM Windows Eudora Version 6.2.1.2 Date: Thu, 05 May 2005 09:14:51 -0600 To: "Rotary motors in aircraft" From: Bill Dube Subject: Re: [FlyRotary] Re: Rotary Canard - was home again In-Reply-To: References: Mime-Version: 1.0 Content-Type: text/html; charset="us-ascii" I think that the sooner you combine the flows from the separate exhaust ports, the quieter the exhaust note becomes. Of course, you reduce scavenging as you move the cross-over closer to the ports. This may not matter much on the RX-8, however.

At 07:48 PM 5/4/2005, you wrote:

After hearing the plane last fall, I can tell you that both the sound level & 'tone quality' are a refreshing departure from typical rotary sound. If Paul finds that he's making adequate power with reasonable fuel economy, he will deserve credit for an amazing 'find'.

Charlie

Steve Brooks wrote:

Paul,
Thanks for the photos. You're right, its pretty simple. I'm surprised that
it's not louder.

Steve

-----Original Message-----
From: Rotary motors in aircraft [ mailto:flyrotary@lancaironline.net]On
Behalf Of Paul
Sent: Wednesday, May 04, 2005 8:48 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Rotary Canard - was home again

Hi, Steve and thanks for the reply. I am running what I believe to be the
simplest and most bullet-proof exhaust going. I am using the stock cast iron
manifold, (which does a great job of absorbing engine pulses), with a short
8 inch long exhaust pipe. Total weight is 12 pounds. See attached pics.
Everyone at the flying field tells me that it is no louder than the
Lycomings....just a "different" sound some say. Hope this helps. Paul
Conner

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