X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from hrndva-omtalb.mail.rr.com ([71.74.56.124] verified) by logan.com (CommuniGate Pro SMTP 5.2.11) with ESMTP id 3434482 for flyrotary@lancaironline.net; Mon, 19 Jan 2009 23:40:44 -0500 Received-SPF: pass receiver=logan.com; client-ip=71.74.56.124; envelope-from=clouduster@austin.rr.com Received: from [10.0.0.99] (really [66.68.45.184]) by hrndva-omta04.mail.rr.com with ESMTP id <20090120044007.MEBD28152.hrndva-omta04.mail.rr.com@[10.0.0.99]> for ; Tue, 20 Jan 2009 04:40:07 +0000 Message-ID: <497555A5.3070605@austin.rr.com> Date: Mon, 19 Jan 2009 22:40:05 -0600 From: Dennis Haverlah User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: DNA Muffler References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------030806070600040705040306" This is a multi-part message in MIME format. --------------030806070600040705040306 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit The Renesis manifold has a turn down of about 30 deg. after the front rotor exhaust inlet - I used a 4 inch dia. by about 6 inch long piece of stainless pipe used for diesel pickup trucks to make the transition - I call it a swirl pipe because I had the Renesis outlet welded into it tangent to the outer top of the 4 inch piece. The ends of the 4 inch pipe were capped with flat pieces of stainless cut from some of the scrap 4 inch pipe. It was flattened and welded to the ends to seal the pipe. A 1/2 inch hole was drilled into the center of each end cap and a 1/2 inch rod was inserted from one cap to the other and welded to each cap. This was done to keep the caps from flexing outward. The outlet to the muffler was made from tailpipe stainless at an automobile muffler shop. It was welded on tangent to the bottom of the 4 inch pipe. The exhaust flows out of the engine forward and down at 30 deg. It enters the 4 inch pipe near the engine and hopefully goes in a circle as it moves outward along the axis of the swirl pipe. The exhaust than exits at the outer end of the swirl pipe and enters the muffler. The swirl pipe is my way of turning the exhaust 180 deg. to the rear without using a 180 deg. bend. I could not find a 180 deg. bent pipe with a small radius that would fit in the space I had available. I hope this is somewhat clear! Dennis H. Bob Perkinson wrote: > Dennis, > That was the PICTURE that I have been looking for. It looks like the > transition between the manifold and the muffler is made out of 3 > pieces of pipe. Two small pieces, one for the inlet that has been > sectioned to provide the proper angle and one for the outlet, and one > large piece pressed into and oval and caped at each end. Is that the > way that it is made? > > Bob Perkinson > > -------------- Original message from Dennis Haverlah > : -------------- > > One more muffler picture. > Dennis H. > > Dennis Haverlah wrote: > >> >>-- >>Homepage: http://www.flyrotary.com/ >>Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >> >> --------------030806070600040705040306 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit The Renesis manifold has a turn down of about 30 deg. after the front rotor exhaust inlet - I used a 4 inch dia. by about 6 inch long piece of stainless pipe used for diesel pickup trucks to make the transition - I call it a swirl pipe because I had the Renesis outlet welded into it tangent to the outer top of the 4 inch piece. The ends of the 4 inch pipe were capped with flat pieces of stainless cut from some of the scrap 4 inch pipe. It was flattened and welded to the ends to seal the pipe. A 1/2 inch hole was drilled into the center of each end cap and a 1/2 inch rod was inserted from one cap to the other and welded to each cap. This was done to keep the caps from flexing outward. The outlet to the muffler was made from tailpipe stainless at an automobile muffler shop. It was welded on tangent to the bottom of the 4 inch pipe. The exhaust flows out of the engine forward and down at 30 deg. It enters the 4 inch pipe near the engine and hopefully goes in a circle as it moves outward along the axis of the swirl pipe. The exhaust than exits at the outer end of the swirl pipe and enters the muffler. The swirl pipe is my way of turning the exhaust 180 deg. to the rear without using a 180 deg. bend. I could not find a 180 deg. bent pipe with a small radius that would fit in the space I had available.

I hope this is somewhat clear!

Dennis H.

Bob Perkinson wrote:

Dennis,
That was the PICTURE that I have been looking for. It looks like the transition between the manifold and the muffler is made out of 3 pieces of pipe. Two small pieces, one for the inlet that has been sectioned to provide the proper angle and one for the outlet, and one large piece pressed into and oval and caped at each end. Is that the way that it is made?

Bob Perkinson
-------------- Original message from Dennis Haverlah <clouduster@austin.rr.com>: --------------

One more muffler picture.
Dennis H.

Dennis Haverlah wrote:
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