X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-d22.mx.aol.com ([205.188.144.208] verified) by logan.com (CommuniGate Pro SMTP 5.2.1) with ESMTP id 2844990 for flyrotary@lancaironline.net; Sat, 12 Apr 2008 14:20:54 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.144.208; envelope-from=BMears9413@aol.com Received: from BMears9413@aol.com by imo-d22.mx.aol.com (mail_out_v38_r9.3.) id q.c07.3273bbe8 (37143) for ; Sat, 12 Apr 2008 14:20:14 -0400 (EDT) Received: from FWM-D17 (fwm-d17.webmail.aol.com [205.188.160.209]) by cia-ma03.mx.aol.com (v121.4) with ESMTP id MAILCIAMA035-91174800fd5e2dc; Sat, 12 Apr 2008 14:20:14 -0400 References: To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] Re: adding a tubing bead Date: Sat, 12 Apr 2008 14:20:14 -0400 X-AOL-IP: 65.182.71.8 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: bmears9413@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8CA6AE0FCE623D5_13C8_A8E6_FWM-D17.sysops.aol.com" X-Mailer: AOL Webmail 35972-STANDARD Received: from 65.182.71.8 by FWM-D17.sysops.aol.com (205.188.160.209) with HTTP (WebMailUI); Sat, 12 Apr 2008 14:20:14 -0400 Message-Id: <8CA6AE0FCDA380E-13C8-5486@FWM-D17.sysops.aol.com> X-Spam-Flag: NO ----------MB_8CA6AE0FCE623D5_13C8_A8E6_FWM-D17.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" They also make an epoxy type product the repair exhaust manifolds. I put som= e on my old GSX cracked exhaust manifold about 5 years ago. Its still there=20= and sealing. Bob Mears -----Original Message----- From: Al Gietzen To: Rotary motors in aircraft Sent: Sat, 12 Apr 2008 1:16 pm Subject: [FlyRotary] Re: adding a tubing bead JBWeld? =C2=A0 Hum-m-m; that should work. =C2=A0 Al ----- Original Message -----=20 From: Al Gietzen=20 To: Rotary motors in aircraft=20 Sent: Saturday, April 12, 2008 10:55 AM Subject: [FlyRotary] Re: adding a tubing bead =C2=A0 Subject: [FlyRotary] Re: adding a tubing bead =C2=A0 Al, you could do like Tracy did on his original, wrap a string coated with e= poxy around the tube.=C2=A0 I hope that idea it still works, as I did mine t= hat way.=C2=A0 JohnD Yes; but what epoxy?=C2=A0 Most epoxies lose strength rapidly above about 15= 0F.=C2=A0 What keeps the bead in place at 210F when the pressure is the high= est?=C2=A0 You would want to use an epoxy that was good to 300F. =C2=A0 Whether it works depends on the connection configuration.=C2=A0 Just conside= r the x-sectional area of the connection, the expected pressure, and the con= straints counteracting the force. Some connections don=E2=80=99t need a bead= at all.=C2=A0 A short coupling hose in a straight line where things are con= strained at both ends needs no bead. The pressure forces offset. A longer ho= se with a 90 degree bend needs a bead or the pressure will blow the hose off= the connection. =C2=A0 Just some rambling thoughts=C2=A0 . .=C2=A0=20 =C2=A0 Al =C2=A0 =C2=A0 No virus found in this incoming message. Checked by AVG.=20 Version: 7.5.519 / Virus Database: 269.22.12/1374 - Release Date: 4/11/2008=20= 4:59 PM ----------MB_8CA6AE0FCE623D5_13C8_A8E6_FWM-D17.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8" They also make an epoxy type product the repair exhaust manifolds. I put som= e on my old GSX cracked exhaust manifold about 5 years ago. Its still there=20= and sealing.

Bob Mears



-----Original Message-----
From: Al Gietzen <ALVentures@cox.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Sat, 12 Apr 2008 1:16 pm
Subject: [FlyRotary] Re: adding a tubing bead

JBWeld?
 
Hum-m-m; that shoul= d work.
 
Al
----- Original Mess= age -----
= From: Al Gietzen
Saturday, April 12, 2008 10:55 AM
[FlyRotary] Re: adding a tubing bead=
 
[FlyRotary] Re: adding a tubing bead
 
Al, you could do li= ke Tracy did on his original, wrap a str= ing coated with epoxy around the tube.  I hope that idea it still works= , as I did mine that way.  JohnD
Yes; but what epoxy?  Most epoxies lose strength rapidly abov= e about 150F.  What keeps the bead in place at 210F when the pressure i= s the highest?  You would want to use an epoxy that was good to 300F.
 
Whether it works depends on the connection configuration.  Ju= st consider the x-sectional area of the connection, the expected pressure, a= nd the constraints counteracting the force. Some connections don=E2=80=99t n= eed a bead at all.  A short coupling hose in a straight line where thin= gs are constrained at both ends needs no bead. The pressure forces offset. A= longer hose with a 90 degree bend needs a bead or the pressure will blow th= e hose off the connection.
 
Just some rambling thoughts  . . 
 
Al
 
 
No virus found in this incom= ing message.
Checked by AVG.
Version: 7.5.519 / Virus Database: 269.22.12/1374 - Release Date: 4/11/2008 4:59 PM
Get= the MapQuest Toolbar, Maps, Traffic, Directions & More!=20=
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