Return-Path: Received: from lanfear.nidlink.com ([216.18.128.7]) by truman.olsusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-52269U2500L250S0V35) with ESMTP id com for ; Fri, 24 Sep 1999 11:02:24 -0400 Received: from enaila.nidlink.com (root@enaila.nidlink.com [216.18.128.8]) by lanfear.nidlink.com (8.9.0/8.9.0) with ESMTP id IAA08404 for ; Fri, 24 Sep 1999 08:06:13 -0700 (PDT) Received: from regandesigns.com (tnt132-57.nidlink.com [216.18.132.57]) by enaila.nidlink.com (8.9.0/8.9.0) with ESMTP id IAA03568 for ; Fri, 24 Sep 1999 08:06:11 -0700 (PDT) Message-ID: <37EB9336.649AB77D@regandesigns.com> Date: Fri, 24 Sep 1999 08:05:26 -0700 From: Brent Regan To: Lancair List Subject: Re: Erring OAT's; aileron trim tabs X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Could it be that hot air is leaking out of the spinner to cowling gap and warming the boundary layer? Try sticking the probe out farther to get it into clean cold air. You can also swap with another channel to eliminate the electronics as the source. The other day I had one cylinder head reading high. It came on suddenly so I suspected the probe. To test this I removed the CHT probe and it's neighbor. I put them next to one another and wrapped copper foil around the tips. I then heated them with a torch and watched the CHT gage. They tracked together so I knew the problem was elsewhere. It turned out to be a weak magneto that was allowing the cylinder to detonate. Regards Brent Regan >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html