X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-banded.atl.sa.earthlink.net ([209.86.89.70] verified) by logan.com (CommuniGate Pro SMTP 5.1.0) with ESMTP id 1490313 for flyrotary@lancaironline.net; Sat, 21 Oct 2006 00:50:07 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.70; envelope-from=Dastaten@earthlink.net Received: from [69.91.63.162] (helo=[192.168.0.3]) by elasmtp-banded.atl.sa.earthlink.net with asmtp (Exim 4.34) id 1Gb8nh-0000JQ-9n for flyrotary@lancaironline.net; Sat, 21 Oct 2006 00:49:37 -0400 Message-ID: <4539A6C1.9000007@earthlink.net> Date: Fri, 20 Oct 2006 23:49:05 -0500 From: David Staten User-Agent: Mozilla Thunderbird 1.0.7 (Windows/20050923) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Fuse Ratings for Wiring?? References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-ELNK-Trace: 9a30bff84e6cb88f95c85d38d22416599ef193a6bfc3dd489fee417e860598055940da1339e78cf5666fa475841a1c7a350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 69.91.63.162 Ed Anderson wrote: > I can not help but wonder why these type of high value aircraft use > circuit breakers rather than fuses. Circuit breakers are in essence > no more than a mechanical switch (we all use those I believe) > activated by heat rather than a finger. But, this debate could (has > and will) continue into the future, for sure. For the planes that have a gajillion and one circuits, the breakers can serve as a switch for maintenance or troubleshooting of a portion of a component system. The switch on the panel may turn the whole system ON or OFF.. an individual actuator or motor may have its own breaker.. for example..