Received-SPF: pass
 receiver=logan.com; client-ip=75.180.132.123; envelope-from=eanderson@carolina.rr.com
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Exhaust system wall thickness
Date: Mon, 27 Apr 2009 18:30:29 -0400
MIME-Version: 1.0
Content-Type: text/plain;
	charset="US-ASCII"
Content-Transfer-Encoding: 7bit
In-Reply-To: <list-3595626@logan.com>
Thread-Index: AcnFBtpR4AzFVVW7S4Cb6xpjP5cVjwCgFt/g
Message-Id: <20090427223021258.LZGY23317@cdptpa-omta01.mail.rr.com>

Hi Chris,

When I built my 13B exhaust headers back in 1993 or so, I used Stainless
Steel Railing material (schedule 40 pipe I believe) rather than tubing.  I
had read several incidents about RX-7s having leaks which acted like a
cutting torch.  Needless to say, I did not want one in my aircraft
installations.  So the schedule 40 pipe is approx 0.12" wall thickeness. 

I was lucky to get a very skilled welder (welded turbine blades) who put it
together.  That was over 10 years ago and it still appears to be fine, a
little rust colored but still structurally sound.

The thicker walls also made it easier to weld in O2 bungs.

As best I could determine the material was S304 stainless.  There are more
heat resistant grades of stainless but for a thick walled pipe, this seems
to work OK.

Hope this helps.

Ed Anderson

Rv-6A N494BW Rotary Powered

Matthews, NC

eanderson@carolina.rr.com

http://www.andersonee.com

http://www.dmack.net/mazda/index.html

http://www.flyrotary.com/

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.rotaryaviation.com/Rotorhead%20Truth.htm


-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Christopher Owens
Sent: Friday, April 24, 2009 2:03 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Exhaust system wall thickness

Hi all,

Looking through the archives today, searching for some additional  
information regarding materials to build a rotary exhaust system  
with, and I found some notes about using SS handrail tubing,  
approximately 0.12" in wall thickness.  If one were to build matching  
muffler components to attach to those tubes, would 0.12" be  
sufficient thickness (presuming 304SS or similar)?  Thicker?  Thinner?

Many thanks and best regards,
Chris

--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:
http://mail.lancaironline.net:81/lists/flyrotary/List.html

__________ Information from ESET NOD32 Antivirus, version of virus signature
database 3267 (20080714) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

 
__________ Information from ESET NOD32 Antivirus, version of virus signature
database 3267 (20080714) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com