Return-Path: Received: from smtp9.gateway.net ([208.230.117.253]) by truman.olsusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-52269U2500L250S0V35) with ESMTP id com for ; Sat, 2 Oct 1999 01:29:11 -0400 Received: from oemcomputer (1Cust125.tnt1.coeur-dalene.id.da.uu.net [63.27.107.125]) by smtp9.gateway.net (8.9.3/8.9.3) with SMTP id BAA04261 for ; Sat, 2 Oct 1999 01:33:00 -0400 (EDT) Message-ID: <003b01bf0c97$dfe84740$7d6b1b3f@oemcomputer> Reply-To: "dfs" From: "dfs" To: "Lancair List" Subject: OAT errors and aerodynamic heating Date: Fri, 1 Oct 1999 22:34:30 -0700 X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> All interesting stuff, Fred, however with all the obvious experience you have with such things, you should also know that getting within 7 degrees (+ or -) of the true value is about par for the course with most of our GA instrumentation anyway. That is, of course, unless you have one of those "big iron" air data computers to make all the correstions for you. On an average day - temperature somewhere between 50 and 90 degrees F - a 7 degree error at 200 Kts is about as good as one can expect - or need, since even a good "Whiz Wheel" can't be set, or read, much closer than 10%. Besides, knowing the temperature, for instance to calculate density altitude within 10%, is all that one should count on. Sweat the big things - such as have I enough fuel, or more importantly, is there an operating Biffy at the next airport - and leave the fly specks where they just add flavor. Dan Schaefer >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html