Return-Path: Received: from [65.54.169.89] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2904113 for flyrotary@lancaironline.net; Wed, 24 Dec 2003 13:11:03 -0500 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 24 Dec 2003 10:11:02 -0800 Received: from 67.24.244.200 by bay3-dav59.bay3.hotmail.com with DAV; Wed, 24 Dec 2003 18:11:02 +0000 X-Originating-IP: [67.24.244.200] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: stainless exhaust components? Date: Wed, 24 Dec 2003 13:10:59 -0500 MIME-Version: 1.0 X-Mailer: MSN Explorer 7.02.0011.2700 Content-Type: multipart/alternative; boundary="----=_NextPart_001_0000_01C3CA1F.5FAB61D0" Message-ID: X-OriginalArrivalTime: 24 Dec 2003 18:11:02.0959 (UTC) FILETIME=[4A9AD3F0:01C3CA49] ------=_NextPart_001_0000_01C3CA1F.5FAB61D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com ----- Original Message ----- =20 From: Russell Duffy =20 To: Rotary motors in aircraft =20 Sent: Wednesday, December 24, 2003 11:30 AM Subject: [FlyRotary] Re: stainless exhaust components? I agree, Dawley Stainless is pretty good. =20 Thanks Todd. So here's another question- I've got an exhaust pipe expand= er, that appears to be made to expand one pipe, so the next will fit insi= de. Do you think this will work with .035 wall SS tube? I'm still tryin= g to figure out the best way to arrange pre-bent pieces, and join them to= gether. =20 I spent some time yesterday looking at tubing benders. I thought I had f= ound a reasonably affordable machine that would do 1.75" tube. Unfortuna= tely, it requires a minimum of about .9" wall tubing, to make a 7" radius= bend. In talking to a sales guy, I got a real education on why you abso= lutely have to have a mandrel bender (HUGE $$$) to make tight bends in th= in wall tubing. Needless to say, I'll be buying pre-bent sections and st= icking them together. =20 Rusty =20 The exhaust pipe expander most likely will work, Rusty - especially on th= at thin walled SS. I have found that the 304 SS is more ductile than the= mild steel to work and I have used expanders to swag the thin wall tubin= g. I generally hook up a air impact wrench to the expander and let the i= mpacing force force the tube wider. Ed Anderson And 321 is even more ductile than 304, wonderful stuff to work with and w= eld. I use the pipe expander & impact wrench trick on .035 & .049. Work= s great depending on quality of hardware in expanders. The threads get g= alled up pretty quick on cheepies. Tracy Crook ------=_NextPart_001_0000_01C3CA1F.5FAB61D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
 
=
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
----- Original Message -----
= Sent: Wednesday, December 24, 2003 11:30 AM
Subject: [FlyRotary] Re: stainless exhaust compone= nts?

<= SPAN class=3D952390006-24122003>I agree, Dawley Stai= nless is pretty good.  
<= DIV> 
Thanks Todd.  So here's = another question- I've got an exhaust pipe expander, that appears to be m= ade to expand one pipe, so the next will fit inside.  Do you think t= his will work with .035 wall SS tube?  I'm still trying to figu= re out the best way to arrange pre-bent pieces, and join them together.&n= bsp; 
 
I spent some time yesterday looking at tubing benders.  I = thought I had found a reasonably affordable machine that would do 1.75" t= ube.  Unfortunately, it requires a minimum of about .9" wall tubing,= to make a 7" radius bend.  In talking to a sales guy, I got a real = education on why you absolutely have to have a mandrel bender (HUGE $$$) = to make tight bends in thin wall tubing.  Needless to say, I'll be b= uying pre-bent sections and sticking them together.  
 
Rusty = ;  
 
The= exhaust pipe expander most likely will work, Rusty - especially on that = thin walled SS.  I have found that the 304 SS is more ductile than t= he mild steel to work and I have used expanders to swag the thin wall tub= ing.  I generally hook up a air impact wrench to the expander a= nd let the impacing force force the tube wider.
 
Ed Anderson

 

And 321 is even more ductile than 304, wonderful = stuff to work with and weld.  I use the pipe expander & impact w= rench trick on .035 & .049.  Works great depending on quality of= hardware in expanders.  The threads get galled up pretty = quick on cheepies.

Tracy Crook

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