Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site lanl.ARPA Path: utzoo!watmath!clyde!cbosgd!ihnp4!zehntel!hplabs!hao!seismo!cmcl2!lanl!jlg From: jlg@lanl.ARPA Newsgroups: net.aviation Subject: Re: aviation calculators Message-ID: <17293@lanl.ARPA> Date: Tue, 4-Dec-84 12:30:44 EST Article-I.D.: lanl.17293 Posted: Tue Dec 4 12:30:44 1984 Date-Received: Thu, 6-Dec-84 06:42:08 EST References: <128@anwar.UUCP> <208@terak.UUCP> Sender: newsreader@lanl.ARPA Distribution: net.general Organization: Los Alamos National Laboratory Lines: 16 > The only aviation calculator that I've seen that would have > been worthwhile was made by Heathkit a number of years ago. It > included a clock, and would accept up to 9 checkpoints and > a flight plan. As you passed over each checkpoint, you punched > a button and the calculator would figure out how long the preceding > leg took. This information, combined with the heading that you > had to hold to get where you were going, allowed the calculator > to figure out what the wind must have been, and then would > extrapolate the following legs of the flight plan based on that > wind. Then it could give you neat info like ETA at each > checkpoint, groundspeed, fuel remaining, etc. That's easy. I programmed my HP-41CV to do that months ago, and I'm not even a pilot (yet). Of course, only 9 checkpoints won't make it past a cross country check ride. My instructor wanted checkpoints every five minutes!