X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [129.116.87.143] (HELO MAIL01.austin.utexas.edu) by logan.com (CommuniGate Pro SMTP 5.0.7f) with ESMTP id 954887 for flyrotary@lancaironline.net; Thu, 26 Jan 2006 14:46:24 -0500 Received-SPF: none receiver=logan.com; client-ip=129.116.87.143; envelope-from=mark.steitle@austin.utexas.edu X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C622B1.153E9890" Subject: RE: [FlyRotary] Epoxy Date: Thu, 26 Jan 2006 13:45:38 -0600 Message-ID: <87DBA06C9A5CB84B80439BA09D86E69E0387D9E7@MAIL01.austin.utexas.edu> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Epoxy Thread-Index: AcYirPEwRobTSFa2RBi+wWsk9D0u8gAA2D1w From: "Mark R Steitle" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C622B1.153E9890 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable John, Are you measuring the mix ratio by weight or volume? From your post, it sounds like you're going by volume. That could be the problem. Also, what's the age of the hardener? Is it still within the mfg's shelf-life period? Did the remainder of the mix left in the cup cure, or is it still soft? Its always a good practice to keep the residue and check it with a sharp object the following day, just to make sure it hardened properly. Have you spoken with the manufacturer? =20 =20 Mark S. =20 =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John Downing Sent: Thursday, January 26, 2006 1:16 PM To: Rotary motors in aircraft Subject: [FlyRotary] Epoxy =20 Question for you glass fellows. Yesterday I laid up some cloth on the cowl and it didn't harden. I put some heat on it with the heat lamp and left it over night and nothing. This morning I put the heat lamp on it and pulled it off, scraped it and ground the area, wiped it down again with acetone and tried again. The epoxy is United Resin Corp. Uni-Lam. The shop is hot water heated with pipe in the floor and this epoxy is supposed to work at room temperature..The ratio by volume is 1 to 3.8, it has been working ok by using a marked stick in a soup can, but I'm wondering if this ratio is hyper critical. Any input would be greatly appreciated. JohnD ------_=_NextPart_001_01C622B1.153E9890 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

John,

Are you measuring the mix ratio by = weight or volume? From your post, it sounds like you’re going by = volume. That could be the problem. Also, what’s the age of the hardener? Is it still within the mfg’s shelf-life = period? Did the remainder of the mix left in the cup cure, or is it still = soft? Its always a good practice to keep the residue and check it with a sharp = object the following day, just to make sure it hardened properly. Have you = spoken with the manufacturer?

Mark S. =

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John Downing
Sent: Thursday, January = 26, 2006 1:16 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = Epoxy

Question for you glass fellows. Yesterday I = laid up some cloth on the cowl and it didn't harden. I put some heat = on it with the heat lamp and left it over night and nothing. This morning I put the heat lamp on it and pulled it off, scraped it and = ground the area, wiped it down again with acetone and tried again. The = epoxy is United Resin Corp. Uni-Lam. The shop is hot water heated with pipe = in the floor and this epoxy is supposed to work at room temperature..The ratio = by volume is 1 to 3.8, it has been working ok by using a marked stick = in a soup can, but I'm wondering if this ratio is hyper critical. Any = input would be greatly appreciated. JohnD

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