Return-Path: Received: from wind.imbris.com ([216.18.130.7]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Tue, 5 Sep 2000 10:51:44 -0400 Received: from regandesigns.com (nortel131-136.imbris.com [216.18.131.136]) by wind.imbris.com (8.9.3/8.9.3) with ESMTP id HAA36499 for ; Tue, 5 Sep 2000 07:57:11 -0700 (PDT) Message-ID: <39B4EDD9.17F2569B@regandesigns.com> Date: Tue, 05 Sep 2000 07:58:01 -0500 From: Brent Regan To: Lancair List Subject: Re: Trim runaway X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> While I haven't had a trim runaway due to a stuck button, I have had a trim runaway due to an inexperienced co-pilot putting their thumb on top of the MAC grip. I have relays configured to give the pilot's trim control authority over the co-pilot's control. I also have the trim breaker front and center, away from the other breakers, clustered with the trim indicators, just above the engine controls. The one thing I wish I had done different is to put remote auxiliary trim switches that get their power from a different source than the trim breaker (or trim master). Since I used high quality hermetically sealed relays, the most likely failure would be a stuck trim button. Since you are not going to notice and react to a runaway trim until a significant amount of "bad" trim is applied, it would be nice to be able to re-center the trim using the remote buttons. A hard over failure due to a malfunction in the motor is unlikely if not impossible. The motor will fail dead. Regards Brent Regan >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>