X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao102.cox.net ([68.230.241.44] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2198545 for flyrotary@lancaironline.net; Wed, 25 Jul 2007 12:13:39 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.44; envelope-from=dale.r@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao102.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20070725161300.NCFL1428.fed1rmmtao102.cox.net@fed1rmimpo01.cox.net> for ; Wed, 25 Jul 2007 12:13:00 -0400 Received: from [192.168.1.101] ([72.223.48.245]) by fed1rmimpo01.cox.net with bizsmtp id TsCz1X00Q5HQYSo0000000; Wed, 25 Jul 2007 12:12:59 -0400 Message-ID: <46A7768A.7040100@cox.net> Date: Wed, 25 Jul 2007 09:12:58 -0700 From: Dale Rogers Reply-To: dale.r@cox.net User-Agent: Thunderbird 2.0.0.5 (Windows/20070716) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Exhaust flow References: In-Reply-To: Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Lehanover@aol.com wrote:

On the exhaust side ...

Primary lengths in multiples of about 11" to 12". A straight run out of the port as long as possible before the first turn. Both primaries the exact same length, and entering the collector in exactly the same angle.

Did Lynn just answer my earlier question? Is 11-12" the distance an
exhaust pulse travels before the next one starts into the pipe?
(Assuming, say, 6500 RPM?)

Dale R.
COZY MkIV #1254