Return-Path: Received: from [65.33.162.117] (account ) by logan.com (CommuniGate Pro WebUser 4.0b6) with HTTP id 1688430 for ; Thu, 15 Aug 2002 08:42:23 -0400 From: "Marvin Kaye" Subject: Re: [LML] Re: Reasons why suppliers shun airplane builders To: lml X-Mailer: CommuniGate Pro Web Mailer v.4.0b6 Date: Thu, 15 Aug 2002 08:42:23 -0400 Message-ID: In-Reply-To: <029501c24455$e73c68c0$d567fea9@mchsi.com> MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Transfer-Encoding: 8bit Posted for "Cy Galley" : Your point about fitting materials is a very valid one. The fact that the drains are aluminum is not. No pressure. The lines to your filter or cooler are using pressure but it a continual pressure not a varying pressure line a prop line. I would imagine that under the right conditions, a harmonic or an "oil hammer" might be induced in the prop line which might be the reason for Lycoming to go with steel fittings. That's my SWAG! Cy Galley, TC - Chair, Emergency Aircraft Repair, Oshkosh Editor, EAA Safety Programs cgalley@qcbc.org or experimenter@eaa.org Always looking for articles for the Experimenter >> You might want to look at the oil drains on any Lycoming engine, they are Aluminum AN fittings. <<