Return-Path: Received: from [24.25.9.101] (HELO ms-smtp-02-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2904043 for flyrotary@lancaironline.net; Wed, 24 Dec 2003 12:14:44 -0500 Received: from o7y6b5 (clt78-020.carolina.rr.com [24.93.78.20]) by ms-smtp-02-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id hBOHEeAc000867 for ; Wed, 24 Dec 2003 12:14:42 -0500 (EST) Message-ID: <000a01c3ca41$06e287a0$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: stainless exhaust components? Date: Wed, 24 Dec 2003 12:11:52 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01C3CA17.1DB89340" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0007_01C3CA17.1DB89340 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message 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 = expander, that appears to be made to expand one pipe, so the next will = fit inside. Do you think this will work with .035 wall SS tube? I'm = still trying to figure out the best way to arrange pre-bent pieces, and = join them together. =20 I spent some time yesterday looking at tubing benders. I thought I = had found a reasonably affordable machine that would do 1.75" tube. = 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 buying = pre-bent sections and sticking them together. =20 Rusty =20 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 = the mild steel to work and I have used expanders to swag the thin wall = tubing. I generally hook up a air impact wrench to the expander and let = the impacing force force the tube wider. Ed Anderson ------=_NextPart_000_0007_01C3CA17.1DB89340 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Wednesday, December 24, = 2003 11:30=20 AM
Subject: [FlyRotary] Re: = stainless=20 exhaust components?

I agree, = Dawley=20 Stainless is pretty good.  
 
Thanks Todd.  So here's = another=20 question- I've got an exhaust pipe expander, that appears to be made = to expand=20 one pipe, so the next will fit inside.  Do you think this will=20 work with .035 wall SS tube?  I'm still trying to figure out = the=20 best way to arrange pre-bent pieces, and join them=20 together.  
 
I spent some time yesterday = looking at=20 tubing benders.  I thought I had found a reasonably affordable = machine=20 that would do 1.75" tube.  Unfortunately, it requires a minimum = of about=20 .9" wall tubing, to make a 7" radius bend.  In talking to a sales = guy, I=20 got a real education on why you absolutely have to have a mandrel = bender (HUGE=20 $$$) to make tight bends in thin wall tubing.  Needless to say, = I'll be=20 buying pre-bent sections and sticking them=20 together.  
 
Rusty   
 
The exhaust pipe expander most likely will = work,=20 Rusty - especially on that thin walled SS.  I have found that the = 304 SS=20 is more ductile than the mild steel to work and I have used expanders = to swag=20 the thin wall tubing.  I generally hook up a air impact = wrench to=20 the expander and let the impacing force force the tube=20 wider.
 
Ed=20 Anderson
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