Return-Path: Received: from imo23.mx.aol.com ([198.81.17.67]) by truman.olsusa.com (Post.Office MTA v3.1.2 release (PO203-101c) ID# 0-44819U2500L250S0) with ESMTP id AAA1493 for ; Mon, 23 Nov 1998 02:24:47 -0500 Received: from GBFitz@aol.com by imo23.mx.aol.com (IMOv16.10) id 8KMOa03138 for ; Mon, 23 Nov 1998 02:25:03 -0500 (EST) From: GBFitz@aol.com Message-ID: Date: Mon, 23 Nov 1998 02:25:03 EST To: lancair.list@olsusa.com Subject: Theft Protection X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Concentrate on disabling the engine starting system and/or the fuel delivery system. Start with the starting system, and put some secondary switch in series with whatever circuit closes your starter relay (or put another relay and controlling circuitry in series with your existing starter relay). If this isn't enough, you can do some things to disable the ingition systems and fuel pumps, if your plane uses them. Just make sure that anything that interrupts the fuel or ignition systems gets (electrically) removed from the system once your engine starts, to keep a failure in your theft prevention system from causing an unplanned change to your flight plan. Personally, I like the prop lock idea myself. Another simple device is the brake system locks sold in performance car catalogs. It works kind of like a parking brake, where you apply brake pressure and then lock the switch. They use barrel lock cylinders, so they're harder to pick than standard locks. Although you'd need 2 of them to totally disable your plane, I would think that 1 would prevent your plane from going very far, if distance around in a circle doesn't count. Gary