Return-Path: Received: from bewersdorff.com ([192.220.83.90] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with SMTP id 2899778 for flyrotary@lancaironline.net; Sun, 21 Dec 2003 14:14:29 -0500 Received: (qmail 29691 invoked by uid 21338); 21 Dec 2003 19:14:28 -0000 Received: from unknown (HELO rapunzel) ([216.101.149.124]) (envelope-sender ) by 192.220.83.90 (qmail-ldap-1.03) with SMTP for ; 21 Dec 2003 19:14:28 -0000 From: "Marko Bewersdorff" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: Emailing: Ed-Klepeis --- exhaust welds Date: Sun, 21 Dec 2003 11:10:58 -0800 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Importance: Normal In-Reply-To: If you weld a pipe to a flange it is mandatory to weld the pipe on the engine side of the flange only. Then on the outside add only a few (4) spot welds or small triangles 1/2" x 1/2". The reason is simple, the weld weakens the metal, a spot weld distributes the load better to full strength metal, remember it is usually not the weld that breaks but the original pipe right next to it breaks. Also if possible keep in mind that the exhaust will break eventually. Keep fuel lines and oil lines out of the way of the potential leaking exhaust gases and if you have a plastic spar like I do, do something to keep the wing from melting off. Marko