[j.p.s]

Originally Posted by j.p.s

In the book, a spaceship pilot was doing complex interstellar navigation calculations with a 3 foot diameter circular slide rule.

Originally Posted by DNSB

Sounds like the astrogation slide rule in Robert A. Heinlein's Starman Jones though as far as I recall, the actual size was never mentioned. Slide rules were also used in The Rolling Stones but I don't remember if they were circular slide rules.

Another deeply etched memory bites the dust.

Thanks. I thought it was by Heinlein, but wasn't sure. Starman Jones seems most likely

Originally Posted by theducks

I still have my 5" one. Guess I better not go into space. Wait I have a HP11C, maybe that would do better.

Mine was 3" or so and was designed to fit in a shirt pocket. The static part was was rectangular and about 3x5 with a bunch of constants and maybe formulas printed on the back. It also had a slide out card with more constants or tables. I think that maybe it was something salesmen hand out to customers. I lost track of it sometime over the years and have never been able to find anything like it until just now. It must have been one of the many made by the company Concise in Japan.