X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 28 Nov 2005 15:59:42 -0500 Message-ID: X-Original-Return-Path: Received: from smtp.perigee.net ([166.82.201.14] verified) by logan.com (CommuniGate Pro SMTP 5.0.2) with ESMTP id 848993 for lml@lancaironline.net; Mon, 28 Nov 2005 13:02:44 -0500 Received-SPF: none receiver=logan.com; client-ip=166.82.201.14; envelope-from=jschroeder@perigee.net Received: from john-study.home_wireless (dsl-208-26-41-113.perigee.net [208.26.41.113]) by smtp.perigee.net (8.12.10/8.12.10) with ESMTP id jASI1vwQ017536 for ; Mon, 28 Nov 2005 13:01:59 -0500 X-Original-Date: Mon, 28 Nov 2005 13:02:22 -0500 X-Original-To: "Lancair Mailing List" Subject: Re: [LML] References: From: "John Schroeder" Content-Type: text/plain; format=flowed; delsp=yes; charset=iso-8859-15 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Original-Message-ID: In-Reply-To: User-Agent: Opera M2/7.54 (Win32, build 3929) Scotty - Post this on the Aeroelectric list: aeroelectric-list@matronics.com. It sounds like the builder used one of Bob Nuckolls' power distribution schemes on the airplane. Quoted below is a clip from a posting today that is similar to yours. ============= I have a question on trouble shooting an aircraft electric system, I'm looking for the experienced answer based on symptoms. The airplane is a 9 year old Lancair 360 currently owned by the original builder. The system is 12 volt with a B&C alternator and voltage regulator (working on model numbers) on a Lycoming IO-360. The system has been working perfectly until last spring, at which time the system would trip the field breaker every now and then. The problem has been more pronounced during periods of cooler weather (Phoenix Arizona). The owner has had the alternator tested locally with no problems found. Most of the time the system works as designed. My latest advice to the owner was to check the engine, alternator, main bus, and voltage regulator grounds first. Wondering what you think? =========================== Cheers, John > > Ok - the problem... At Reno this year, I ran around the pylons at 3000 > rpm for racing. During the flight on Saturday, a 5 amp CB popped. Since > then, at higher rpm (2500 and up) it will pop in about 10 to 15 seconds. > This, I take it, is the alternator field cb. The battery does not charge > when this cb is popped. > > Is this an alternator, voltage regulator, CB, or other issue? I didn't > build the airplane, and there is no detailed wiring schematic.