Posted by Jon on February 20, 2022 at 10:22:12 user Jon.
In Reply to: Re: Calculators posted by Mike Field on February 18, 2022 at 16:37:55:
I'm a constant HP Calc user, from the HP-45 through the HP-41 (C, CV and CX, loaded) and HP-16, HP-28, HP-48, HP-49 and HP-50. Used the '45 for wind vector analysis (the two statistical registers were great for that!). Programmed PDA functions for both the 41 and 48 before phones could do that. I rely on the Swiss Micros HP-41 clones and the a41CV app on my phone now if I need calculations on the go.
The TI59 wasn't a rival to the HP-35; it came along much later, around the time of the HP-67 (HP's second-generation programmable after the HP-65, which NASA used on the Apollo missions. By the time the Shuttle came along they were using the HP-41 on board.
My father went with the TI calculators; even programmed one of them to do track and balance calculations on helicopter rotor heads. That's in the American Helicopter Museum collection now.
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