X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.211.128.10] (HELO mail-in03.adhost.com) by logan.com (CommuniGate Pro SMTP 5.0.7f) with ESMTP id 954875 for flyrotary@lancaironline.net; Thu, 26 Jan 2006 14:34:17 -0500 Received-SPF: none receiver=logan.com; client-ip=216.211.128.10; envelope-from=joeh@pilgrimtech.com Received: from Pilgrim10 (tide36.microsoft.com [131.107.0.86]) by mail-in03.adhost.com (Postfix) with ESMTP id B929D2B1D3D for ; Thu, 26 Jan 2006 11:32:57 -0800 (PST) (envelope-from joeh@pilgrimtech.com) From: "Joe Hull" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Epoxy Date: Thu, 26 Jan 2006 11:32:58 -0800 Message-ID: <00a101c622af$5312f3d0$cda0389d@redmond.corp.microsoft.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00A2_01C6226C.44EFB3D0" X-Mailer: Microsoft Office Outlook 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670 In-Reply-To: thread-index: AcYirPLOpuVOabDpS5Chr2sIknJ9lQAAWkBg This is a multi-part message in MIME format. ------=_NextPart_000_00A2_01C6226C.44EFB3D0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit I'm not familiar with that particular epoxy - BUT - any good epoxy worth putting on your airplane will have a pretty narrow ratio requirement. The MGS I use has a band of +/- 5% before it stops being hard and only cures to a "leather" consistency. Also, heat is required for most all epoxies to do their chemical dance. You may also make sure that you are mixing very very well. You've got to get all those hardener molecules close to their receptor resin molecules so they can link up. Is the hardener crystallized at all? Sometimes with age and cold temps hardeners will crystallize (or clot). Most times you can get it back to its liquid state by heating to about 150F for five minutes or so. That's all I can think of. Regards Joe Hull Cozy Mk-IV #991 (Done! In Phase1 Flight Test 0 hrs) Redmond (Seattle), Washington _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John Downing Sent: Thursday, January 26, 2006 11:16 AM 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 ------=_NextPart_000_00A2_01C6226C.44EFB3D0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

I’m not familiar with that particular epoxy – BUT – any good epoxy worth putting on = your airplane will have a pretty narrow ratio requirement. The MGS I use has = a band of +/- 5% before it stops being hard and only cures to a = “leather” consistency. 

Also, heat is required for most all epoxies to do their chemical dance.

You may also make sure that you are = mixing very very well. You’ve got to get all those hardener molecules = close to their receptor resin molecules so they can link = up.

Is the hardener crystallized at = all?  Sometimes with age and cold temps hardeners will crystallize (or = clot).  Most times you can get it back to its liquid state by heating to about = 150F for five minutes or so.

That’s all I can think = of.

 

Regards

=

Joe = Hull

Cozy Mk-IV #991 (Done! In Phase1 = Flight Test 0 hrs)

Redmond (Seattle), Washington

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John Downing
Sent: Thursday, January = 26, 2006 11:16 AM
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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