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From: rick@cadtec.UUCP (Rick Auricchio)
Newsgroups: net.aviation
Subject: Re: Pressure vs Altitude
Message-ID: <72@cadtec.UUCP>
Date: Mon, 8-Apr-85 13:34:42 EST
Article-I.D.: cadtec.72
Posted: Mon Apr  8 13:34:42 1985
Date-Received: Sat, 13-Apr-85 14:50:23 EST
References: <1164@druxn.UUCP> <1330@amdahl.UUCP> <463@terak.UUCP> <1369@amdahl.UUCP>
Reply-To: rick@cadtec.UUCP (Rick Auricchio)
Distribution: net
Organization: Cadtec Corp., San Jose CA
Lines: 19

another way to guess at altitude is to reverse-compute pressure
altitude from the TAS/IAS differential.  Many airspeed indicators have the TAS
scale: you probably know OAT, IAS (if pitot is ok) and a "usual" TAS.  Set the
"usual" TAS opposite IAS and read pressure altitude next to the OAT.

It's crude, and probably only good to +- 500 feet.
==============================================================================
Opinions expressed have been generated solely by a stuck mike...
{cbosgd,decwrl,hplabs,ihnp4,seismo}!nsc!cadtec!rick    N1150G   (408) 942-1535
"You know you've made a gear-up landing when it takes full power to taxi."