Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Fri, 29 Oct 2004 10:29:03 -0400 Message-ID: X-Original-Return-Path: Received: from www.dynacomm.ws ([198.22.63.66] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 490757 for lml@lancaironline.net; Fri, 29 Oct 2004 10:26:03 -0400 Received-SPF: none receiver=logan.com; client-ip=198.22.63.66; envelope-from=lorn@dynacomm.ws Received: from [10.0.1.202] (adsl-69-209-133-111.dsl.sfldmi.ameritech.net [69.209.133.111]) by www.dynacomm.ws (8.10.2/8.10.2) with ESMTP id i9TEPT415380; Fri, 29 Oct 2004 10:25:29 -0400 In-Reply-To: References: Mime-Version: 1.0 (Apple Message framework v619) Content-Type: text/plain; charset=US-ASCII; format=flowed X-Original-Message-Id: <626AE66E-29B6-11D9-9774-0011242E933C@dynacomm.ws> Content-Transfer-Encoding: 7bit X-Original-Cc: John Stchur , John Goodwin From: "Lorn H. Olsen" Subject: Re: LNC2 cowl vibration cracking / Applied Poleramic plug X-Original-Date: Fri, 29 Oct 2004 10:25:29 -0400 X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.619) > From: bob mackey > Date: October 28, 2004 10:12:54 PM EDT > > Mark Ravinski observes: >> As the prop rotates past the cooling air intakes I would suspect >> there gets to be a pressure pulse of some magnitude in the system. I >> also suspect that this pulse when acting on the cowling might >> contribute to the stress cracking (or spider cracking) commonly seen >> on higher time installations. This is a problem on Lancairs and a lot >> of other planes >> using fiberglass cowling. > . > . > BTW, we have read Dan Newland's suggestions concerning two-phase > toughened epoxy resins and Applied Poleramic in particular. Following > his suggestions, I called Rich Moulton at Applied Poleramic. He was > very helpful and suggested that I try their DR-5 resin with EH-102 > hardener. > . > . > http://www.appliedpoleramic.com/ > http://www.appliedpoleramic.com/ToughenedResinSystems.htm > Phone numbers and prices are on the website. > > They didn't pay me to write any of this. I've been working with > composites for a long time, and I am genuinely impressed with this > product. > . > . > 103MD -at- pure-flight.com > [use this email address - the one at the top is spam bait] Has anyone tried this epoxy from Aircraft Spruce: http://www.aircraftspruce.com/catalog/cmpages/polyepoxy.php The price seems reasonable and the write-up looks good. The only question is: How well does it work? -- Lorn H. 'Feathers' Olsen, MAA, DynaComm, Corp. 248-345-0500, mailto:lorn@dynacomm.ws LNC2, O-320-D1F, N31161, Y47, SE Michigan