Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 exptools 1/6/84; site ihlts.UUCP Path: utzoo!watmath!clyde!floyd!harpo!ihnp4!ihlts!rjnoe From: rjnoe@ihlts.UUCP (Roger Noe) Newsgroups: net.columbia Subject: Re: HP41 calculator and Shuttle Message-ID: <375@ihlts.UUCP> Date: Wed, 29-Feb-84 01:13:07 EST Article-I.D.: ihlts.375 Posted: Wed Feb 29 01:13:07 1984 Date-Received: Fri, 2-Mar-84 06:06:31 EST References: <324@foxvax1.UUCP> Organization: AT&T Bell Labs, Naperville, IL Lines: 14 The information I had on the use of HP-41's on shuttle missions was that two were (and maybe are) carried on every flight. Both had four memory modules each (this was before the advent of both Quad memory modules and the HP-41CV), and were accompanied by card readers, magnetic program cards, extra batteries and memory modules. One HP-41C was dedicated to the AOS (acquisition of signal) program, the other to CG (center of gravity), both about 1000 steps long. The AOS program was started at launch, and told the pilots when the next ground station signal could be picked up and on which frequency. The CG program would be used just before deorbit to determine how much fuel should be burned off from the OMS for proper reentry attitude. I have heard that the use of HP-41's would expand on the shuttle, being used with various peripherals and for other tasks (such as targeting, to land at an alternate runway). More about these when net.micro.hp starts up. Roger Noe ihnp4!ihlts!rjnoe