Return-Path: Sender: (Marvin Kaye) To: lml Date: Thu, 05 Sep 2002 11:48:01 -0400 Message-ID: X-Original-Return-Path: Received: from mailnw.centurytel.net ([209.206.160.237] verified) by logan.com (CommuniGate Pro SMTP 4.0b7) with ESMTP id 1722216 for lml@lancaironline.net; Thu, 05 Sep 2002 11:47:07 -0400 Received: from c656256a (pppoe2639.rb.gh.centurytel.net [64.91.96.141]) by mailnw.centurytel.net (8.12.6/8.12.6) with SMTP id g85Fl4MS025235 for ; Thu, 5 Sep 2002 08:47:06 -0700 (PDT) X-Original-Message-ID: <004501c254eb$78d57ce0$8d605b40@mshome.net> From: "Robert Smiley" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] oil flashpoint X-Original-Date: Thu, 5 Sep 2002 08:49:42 -0600 MIME-Version: 1.0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Thanks Casey, I also know that in the case of model airplane motors, castor oil is preferred for bronze bushing engines and the older engines with cast iron pistons and steel liners as opposed to the new aluminum, bronze, nickel configurations. The case being that if a motor has a lean engine run the castor oil offers more protection and has a higher operating temp as compared to synthetics. Interesting. In the case of percision aerobatics for control-line competition, if you have a lean run on the older engines, you will lose some compression because the piston increased its size as the temp rises and thuse you ultimately lose torque. So, castor oil is preferred for those motors. This probably speaks to the common procedure of breaking our Lycomings and continentals with castor oil. Question: Why do we change out the castor oil for the other oils? Is it because of the additives and the ashless dispersant and to prevent castor oil buildup in the motors? Bob Smiley N94RJ