X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from vms046pub.verizon.net ([206.46.252.46] verified) by logan.com (CommuniGate Pro SMTP 5.1c.3) with ESMTP id 1369793 for flyrotary@lancaironline.net; Fri, 08 Sep 2006 10:33:44 -0400 Received: from [71.99.157.130] by vms046.mailsrvcs.net (Sun Java System Messaging Server 6.2-4.02 (built Sep 9 2005)) with ESMTPA id <0J5A00KR032U3H13@vms046.mailsrvcs.net> for flyrotary@lancaironline.net; Fri, 08 Sep 2006 09:32:55 -0500 (CDT) Date: Fri, 08 Sep 2006 10:32:58 -0400 From: Finn Lassen Subject: Re: [FlyRotary] Exhaust System - Comments? In-reply-to: To: Rotary motors in aircraft Message-id: <45017F1A.6010308@verizon.net> MIME-version: 1.0 Content-type: multipart/alternative; boundary=------------080403030502050903020907 X-Accept-Language: en-us, en References: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) This is a multi-part message in MIME format. --------------080403030502050903020907 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Looks nice. But would still recommend a slip or ball joint in one of the headers. Likely strees point will be at the Y. The headers may be long enough that it's not an issues, but still. 2" for headers is OK, I guess, but could go down to 1.75". Finn Steve Thomas wrote: > I have been lurking on this list for some time, really enjoying and > learning from all of your experiences. I'm the guy who has Mistral's > serial number 001, two rotor normally aspirated engine. > > I just finished tacking this exhaust system together and thought that > I'd ask for comments. The current material is mild steel, but my > plan is to take it to Burns Stainless (just down the road from me) > and have them duplicate it in 16 ga. 321 stainless. The collector > is from Burns, as is the muffler. If you can see the tacks, you'll > be able to see why I'm taking it elsewhere. ;-) The header pipes > are 2" and the combined pipe after the collector is 2 1/2". This was > recommended by Burns. > > After fabrication, I plan to have it coated with HPC HyperCoat > Extreme as my design goal was to get the heat out as quickly and > directly as possible and keep as much in the pipes as possible until > it exits to atmosphere. > > The oddball bends in the header were designed to keep the header > pipes the same length, which they are. Given all the difficulty some > have had with their exhaust systems, I'd thought that I'd throw it > out there for comments. > > Best Regards, > > Steve Thomas > SteveT.Net > > ________________________________________________________________________ > > ------------------------------------------------------------------------ > > > > DSCN0168.JPG > > >------------------------------------------------------------------------ > >-- >Homepage: http://www.flyrotary.com/ >Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ > > >------------------------------------------------------------------------ > >No virus found in this incoming message. >Checked by AVG Free Edition. >Version: 7.1.405 / Virus Database: 268.12.1/440 - Release Date: 9/6/2006 > > --------------080403030502050903020907 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Looks nice. But would still recommend a slip or ball joint in one of the headers. Likely strees point will be at the Y. The headers may be long enough that it's not an issues, but still.

2" for headers is OK, I guess, but could go down to 1.75".

Finn

Steve Thomas wrote:

I have been lurking on this list for some time, really enjoying and learning from all of your experiences. I'm the guy who has Mistral's serial number 001, two rotor normally aspirated engine.

I just finished tacking this exhaust system together and thought that I'd ask for comments. The current material is mild steel, but my plan is to take it to Burns Stainless (just down the road from me) and have them duplicate it in 16 ga. 321 stainless. The collector is from Burns, as is the muffler. If you can see the tacks, you'll be able to see why I'm taking it elsewhere. ;-) The header pipes are 2" and the combined pipe after the collector is 2 1/2". This was recommended by Burns.

After fabrication, I plan to have it coated with HPC HyperCoat Extreme as my design goal was to get the heat out as quickly and directly as possible and keep as much in the pipes as possible until it exits to atmosphere.

The oddball bends in the header were designed to keep the header pipes the same length, which they are. Given all the difficulty some have had with their exhaust systems, I'd thought that I'd throw it out there for comments.

Best Regards,

Steve Thomas
SteveT.Net

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