Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Thu, 18 Sep 2003 09:25:54 -0400 Message-ID: X-Original-Return-Path: Received: from [128.83.126.134] (HELO mail.utexas.edu) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP-TLS id 2584125 for flyrotary@lancaironline.net; Thu, 18 Sep 2003 08:20:15 -0400 Received: (qmail 42369 invoked from network); 18 Sep 2003 12:20:13 -0000 Received: from dhcp-191-101.per.utexas.edu (HELO benefits3.mail.utexas.edu) (146.6.191.101) by wb1.mail.utexas.edu with SMTP; 18 Sep 2003 12:20:13 -0000 X-Original-Message-Id: <5.1.1.5.2.20030918071726.01177050@localhost> X-Sender: msteitle@mail.utexas.edu@localhost X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 X-Original-Date: Thu, 18 Sep 2003 07:20:03 -0500 X-Original-To: "Rotary motors in aircraft" From: Mark Steitle Subject: Re: [FlyRotary] Re: 20B In-Reply-To: Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=====================_454625718==.ALT" --=====================_454625718==.ALT Content-Type: text/plain; charset="us-ascii"; format=flowed At 09:50 PM 9/17/2003 -0400, you wrote: > >----- Original Message ----- >From: Mark Steitle >To: Rotary motors in aircraft >Sent: Wednesday, September 17, 2003 9:01 PM >Subject: [FlyRotary] Re: 20B > >I followed Ed Anderson's lead and used 304-SS, schedule 40, from R.B. >Wagner (www.rbwagner.com). From what Ed discovered, the added wall >thickness is thick enough to dissipate the heat. The main pipe is >thinner as the worst of the heat has been dissipated by the time it gets >down that far downstream. He has been running his exhaust system for a >long time without any problem. The drawback is that its heavier than >thinwall. My 20B exhaust system weighs 20#. > >Mark S. > > WELL, I never claimed it was light, Mark {:>). In fact, folks have > told me that if I had just mounted it to the firewall more securily, I > could have used it as my engine mount. But, you are correct, no problem > with the headers after 293+ engine hours on them. I too use smaller 0.065 > stainless steel tube after the headers. > >Ed Anderson However... you have to realize that the 20# figure for my exhaust system is INCLUDING the muffler. Anyone know the weight of a Spin-Tech muffler? Mark S. --=====================_454625718==.ALT Content-Type: text/html; charset="us-ascii" At 09:50 PM 9/17/2003 -0400, you wrote:
 
----- Original Message -----
From: Mark Steitle
To: Rotary motors in aircraft
Sent: Wednesday, September 17, 2003 9:01 PM
Subject: [FlyRotary] Re: 20B

I followed Ed Anderson's lead and used 304-SS, schedule 40, from R.B. Wagner (www.rbwagner.com).  From what Ed discovered, the added wall thickness is thick  enough to dissipate the heat.  The main pipe is thinner as the worst of the heat has been dissipated by the time it gets down that far downstream.  He has been running his exhaust system for a long time without any problem.  The drawback is that its heavier than thinwall.  My 20B exhaust system weighs 20#.

Mark S.

  WELL, I never claimed it was light, Mark {:>).  In fact, folks have told me that if I had just mounted it to the firewall more securily, I could have used it as my engine mount.  But, you are correct, no problem with the headers after 293+ engine hours on them. I too use smaller 0.065 stainless steel tube after the headers. 
 
Ed Anderson
However... you have to realize that the 20# figure for my exhaust system is INCLUDING the muffler.  Anyone know the weight of a Spin-Tech muffler? 

Mark S.  --=====================_454625718==.ALT--