X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail30.syd.optusnet.com.au ([211.29.133.193] verified) by logan.com (CommuniGate Pro SMTP 5.1c.5) with ESMTPS id 1456815 for flyrotary@lancaironline.net; Wed, 11 Oct 2006 18:29:38 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.133.193; envelope-from=lendich@optusnet.com.au Received: from george (d58-108-106-63.dsl.nsw.optusnet.com.au [58.108.106.63]) by mail30.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id k9BMTBeP021977 for ; Thu, 12 Oct 2006 08:29:12 +1000 Message-ID: <004d01c6ed84$ad8be3d0$3f6a6c3a@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Exhaust Update Date: Thu, 12 Oct 2006 08:29:11 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004A_01C6EDD8.7E25C080" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Antivirus: avast! (VPS 0641-2, 10/10/2006), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_004A_01C6EDD8.7E25C080 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Bill, Beautifully done- as usual. I wish I could do that on CAD. George ( down under) ----- Original Message -----=20 From: wrjjrs@aol.com=20 To: Rotary motors in aircraft=20 Sent: Thursday, October 12, 2006 1:04 AM Subject: [FlyRotary] Re: Exhaust Update David, The method is to put the pipe thru the flange. I've attached = two jpegs to show examples=20 Bill Jepson =20 -----Original Message----- From: dcarter11@sbcglobal.net To: flyrotary@lancaironline.net Sent: Tue, 10 Oct 2006 9:42 PM Subject: [FlyRotary] Re: Exhaust Update How does a welder weld the "inside" of an exhaust pipe joint? Seems = like a long reach with tip of a long welding rod and a woefully small = angle for touching the seam to electricaly weld it. David ----- Original Message -----=20 From: Al Gietzen=20 To: Rotary motors in aircraft=20 Sent: Tuesday, October 10, 2006 8:41 AM Subject: [FlyRotary] Re: Exhaust Update >Just a heads up - it looks like your new "header flange to pipe" = (picture 5) was welded on the >outside. I think that 'acceptable = practices' state that there should only be a tack weld on the >outside = and the actual structural weld should be on the inside. What does = everyone else say? In >any event be sure to keep an eye on the welds. > >Ken Powell=20 It depends on the configuration. Generally, if are side loads due = to thermal stress, vibration, whatever; it is better to have a snug fit = of tube through the flange and weld on the inside. This reduces the = stress on the weld and can increase the reliability of the weld. The = key in either case is the quality of the weld and the heat treatment = after the weld. At least that=E2=80=99s what I recall from my days as a practicing = engineer. Mine are welded on both sides. I=E2=80=99d prefer they were = welded inside only. Al -------------------------------------------------------------------------= ----- Check out the new AOL. Most comprehensive set of free safety and = security tools, free access to millions of high-quality videos from = across the web, free AOL Mail and more. -------------------------------------------------------------------------= ----- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_004A_01C6EDD8.7E25C080 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF

Bill,

Beautifully done- as usual.

I wish I could do that on CAD.

George ( down under)

----- Original Message -----

From:=20 wrjjrs@aol.com

To: Rotary motors in = aircraft

Sent: Thursday, October 12, = 2006 1:04=20 AM

Subject: [FlyRotary] Re: = Exhaust=20 Update

David, The method is to put the pipe thru the flange. I've = attached=20 two jpegs to show examples

Bill Jepson

-----Original Message-----
From: dcarter11@sbcglobal.net
To= : flyrotary@lancaironline.net
Sent:=20 Tue, 10 Oct 2006 9:42 PM
Subject: [FlyRotary] Re: Exhaust = Update

How does a welder weld the "inside" = of an exhaust=20 pipe joint? Seems like a long reach with tip of a long welding = rod and a=20 woefully small angle for touching the seam to electricaly weld=20 it.

David

----- Original Message -----
From:=20 Al = Gietzen=20

To: Rotary=20 motors in aircraft

Sent: Tuesday, October 10, = 2006 8:41=20 AM

Subject: [FlyRotary] Re: = Exhaust=20 Update

>Just a = heads up - it=20 looks like your new "header flange to pipe" (picture 5) was = welded on=20 the >outside. I think that=20 'acceptable practices' state that there should only be a tack weld = on the=20 >outside and the=20 actual structural weld should be on the inside. What does = everyone=20 else say? In >any event be sure to keep an = eye on=20 the welds.

>
>Ken = Powell

It = depends on the=20 configuration. Generally, if are side loads due to thermal = stress,=20 vibration, whatever; it is better to have a snug fit of tube through = the=20 flange and weld on the inside. This reduces the stress on the = weld and=20 can increase the reliability of the weld. The key in either = case is=20 the quality of the weld and the heat treatment after the=20 weld.

At = least that=E2=80=99s=20 what I recall from my days as a practicing engineer. Mine are = welded=20 on both sides. I=E2=80=99d prefer they were welded inside=20 only.

Check out the new AOL. Most comprehensive = set of free=20 safety and security tools, free access to millions of high-quality = videos from=20 across the web, free AOL Mail and more.

--
Homepage: http://www.flyrotary.com/
Archive and=20 UnSub: =20 http://mail.lancaironline.net/lists/flyrotary/
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