X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-d05.mx.aol.com ([205.188.157.37] verified) by logan.com (CommuniGate Pro SMTP 5.0.4) with ESMTP id 888754 for flyrotary@lancaironline.net; Mon, 19 Dec 2005 16:12:03 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.157.37; envelope-from=Lehanover@aol.com Received: from Lehanover@aol.com by imo-d05.mx.aol.com (mail_out_v38_r6.3.) id q.275.2b6a467 (57317) for ; Mon, 19 Dec 2005 16:11:13 -0500 (EST) From: Lehanover@aol.com Message-ID: <275.2b6a467.30d87bf0@aol.com> Date: Mon, 19 Dec 2005 16:11:12 EST Subject: Re: [FlyRotary] Re: Heat Exchangers To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1135026672" X-Mailer: 9.0 SE for Windows sub 5022 X-Spam-Flag: NO -------------------------------1135026672 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 12/19/2005 11:36:34 AM Eastern Standard Time, lors01@msn.com writes: Rusty is the resident expert on failures on these things so a couple of questions for him. Were the connections on the end tanks welded on? I'm wondering if the heat may have weakened the furnace brazed joints there since the failures were always on the ends (I think). I noticed there is an aluminum strap welded to the end tanks from top to bottom on some Harris cores. Did yours have this? I am wondering if they are to resist the expansion force trying to split the tank segments apart. The straps are to control expansion. I weld on the AN (dash 12 male) with the cooler wrapped in a wet towel. I weld just 3/8" or so and then stop. The end tank never gets so hot that you cannot hold on to it. I only tried the Harrison cores. I never had one leak outside of a stone hit. Lynn E. Hanover -------------------------------1135026672 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 12/19/2005 11:36:34 AM Eastern Standard Time,=20 lors01@msn.com writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DVerdana color=3D#000000 siz= e=3D2>

Rusty is the resident expert on failures on these things so a couple=20= of=20 questions for him.

Were the connections on the end tanks welded on? I'm=20 wondering if the heat may have weakened the furnace brazed joints there si= nce=20 the failures were always on the ends (I think). I noticed there is a= n=20 aluminum strap welded to the end tanks from top to bottom on some Harris=20 cores. Did yours have this? I am wondering if they are to resi= st=20 the expansion force trying to split the tank segments=20 apart.

The straps are to control expansion. I weld on the AN (dash 12 male) wi= th=20 the cooler wrapped in a wet towel. I weld just 3/8" or so and then stop. The= end=20 tank never gets so hot that you cannot hold on to it. I only tried the Harri= son=20 cores.

I never had one leak outside of a stone hit.

Lynn E. Hanover

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