X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from bay0-omc1-s26.bay0.hotmail.com ([65.54.246.98] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1334027 for flyrotary@lancaironline.net; Wed, 02 Aug 2006 16:04:42 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.246.98; envelope-from=lors01@msn.com Received: from hotmail.com ([65.54.250.73]) by bay0-omc1-s26.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.1830); Wed, 2 Aug 2006 13:03:54 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 2 Aug 2006 13:03:54 -0700 Message-ID: Received: from 4.171.114.60 by BAY115-DAV1.phx.gbl with DAV; Wed, 02 Aug 2006 20:03:52 +0000 X-Originating-IP: [4.171.114.60] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Stainless 321 Tubing Date: Wed, 2 Aug 2006 16:03:46 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002F_01C6B64D.3C577760" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.20.0029.3000 Seal-Send-Time: Wed, 2 Aug 2006 16:03:46 -0400 X-OriginalArrivalTime: 02 Aug 2006 20:03:54.0659 (UTC) FILETIME=[C81C3F30:01C6B66E] Return-Path: lors01@msn.com This is a multi-part message in MIME format. ------=_NextPart_000_002F_01C6B64D.3C577760 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Just my opinion of course but .049 is plenty thick enough. My original 321 SS header pipes were .035 wall and lasted 905 hours = and were working fine when they were replaced. I sawed the bends and = measured the outside radius wall thickness and they measured .033 after = all that time. The .002 reduction might have been due to the stretching = when they were formed around the mandrill for all I know. Design the manifold to minimize thermal stress and cantilevered loads = and wall thickness requirements are not critical. =20 Tracy ----- Original Message -----=20 From: Joe Hull=20 To: Rotary motors in aircraft=20 Sent: Wednesday, August 02, 2006 11:58 AM Subject: [FlyRotary] Stainless 321 Tubing I'm having a heck of a time finding 321 Stainless mandrel bends in = anything larger than .049 wall. I'm trying to get 4 - 4" Center Line Radius, = 90deg bends in at least .065" wall. I've tried calling 4 places and = researching a hundred others online and my last hope appears to be Woolf Aircraft = Products (http://www.woolfaircraft.com/). Is .049" wall beefy enough? If I recall, it seems that most people are = using material that is larger. RacingBeat/MazdaTrix sell .125" wall but = only in "mild steel" not stainless. Anyone else have any suggestions? Joe Hull Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA)=20 Redmond (Seattle), Washington -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_002F_01C6B64D.3C577760 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Just my opinion of course but .049 is plenty thick enough.
 
  My original 321 SS header pipes were .035 wall and = lasted 905=20 hours and were working fine when they were replaced.  I sawed = the=20 bends and measured the outside radius wall thickness and they = measured=20 033 after all that time.  The .002 reduction might have been = due to=20 the stretching when they were formed around the mandrill for all I = know.
 
Design the manifold to minimize thermal stress and cantilevered = loads and=20 wall thickness requirements are not critical. 
 
Tracy
----- Original Message -----
From: Joe=20 Hull
To: Rotary motors in = aircraft
Sent: Wednesday, August 02, = 2006 11:58=20 AM
Subject: [FlyRotary] Stainless = 321=20 Tubing

I'm having a heck of a time finding 321 Stainless = mandrel bends=20 in anything
larger than .049 wall. I'm trying to get 4 - 4" Center = Line=20 Radius, 90deg
bends in at least .065" wall. I've tried calling 4 = places and=20 researching a
hundred others online and my last hope appears to be = Woolf=20 Aircraft Products
(http://www.woolfaircraft.com/)=

Is=20 .049" wall beefy enough? If I recall, it seems that most people are=20 using
material that is larger.  RacingBeat/MazdaTrix sell = 125" wall=20 but only in
"mild steel" not stainless.

Anyone else have any = suggestions?

Joe Hull
Cozy Mk-IV N31CZ (65 hrs - Rotary 13B = NA)=20
Redmond (Seattle), Washington


--
Homepage:  http://www.flyrotary.com/
Archi= ve and=20 UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/
------=_NextPart_000_002F_01C6B64D.3C577760--