X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from rwcrmhc14.comcast.net ([204.127.192.84] verified) by logan.com (CommuniGate Pro SMTP 5.0.7f) with ESMTP id 954656 for flyrotary@lancaironline.net; Thu, 26 Jan 2006 11:08:37 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.192.84; envelope-from=rlwhite@comcast.net Received: from Quail (bgp01386375bgs.brodwy01.nm.comcast.net[68.35.160.229]) by comcast.net (rwcrmhc14) with SMTP id <20060126160742m1400230ore>; Thu, 26 Jan 2006 16:07:52 +0000 Date: Thu, 26 Jan 2006 09:08:03 -0700 From: Bob White To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Copper seal recovery Message-Id: <20060126090803.69990a5a.rlwhite@comcast.net> In-Reply-To: References: X-Mailer: Sylpheed version 2.2.0beta4 (GTK+ 2.8.3; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Thu, 26 Jan 2006 00:31:28 EST WRJJRS@aol.com wrote: > > In a message dated 1/25/2006 8:22:11 PM Pacific Standard Time, > rlwhite@comcast.net writes: > > He told me I could rejuvenate the old one by heating it red > hot with a torch, then quenching it in water. He said he hadn't bought > a new one in years. > > > > Bob, > The technique described is ok, but you will have better luck simply > allowing the copper to cool in air rather than quenching it. That gives a better > annealing and does work fine. I remove the scale created with a Scotchbrite pad. > Bill Jepson > Hi Bill, Tht makes sense now that I think about it. Quenching is used to harden a material in general. If it still leaks, I'll air cool it. Bob W. -- http://www.bob-white.com N93BD - Rotary Powered BD-4 (first engine start 1/7/06) Custom Cables for your rotary installation - http://www.roblinphoto.com/shop/