~aiwein

About

I like weird stuff, I am overly verbose and I am prone to overthinking. I use Emacs, program in Python by the seat of my pants, and create Awk pipelines when I'm feeling kinky.

See also: About the name

Log

Entries - shouts, notes, or interesting links I found - are in reverse chronological order (i.e., newest first).

2019-11-24 - Hardware archeology - Mechanical computing mechanisms

A long, long time ago - possibly more than a decade - I stumbled across an old manual on mechanical computers, which were used for fire control systems back in the forties.

I changed my laptop at least twice since, and even if I probably still have that file, I have no idea where that might be.

Today, I found it again, almost by accident, when clicking on a Wikipedia link gave me the magic words I needed for Google to find it again: it was Basic Fire Control Mechanisms, OP 1140, from 1944, and it’s available online from at least two locations.

I can barely wrap my head around the basic components described in Section 2, and they are of course impressively impractical, but also fascinating. Need to implement the trigonometric functions in hardware? Just cut the right groove into a cam! And don’t worry if your computer is starting to look like a dieselpunk torture devices, those are just multipliers and integrators!

Basic Fire Control Mechanisms - Maritime Park Association
Basic Fire Control Mechanisms - Historic Naval Ships Association Archive

2019-06-22

2019-05-17

2019-05-04

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