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Ken Shirriff

@kenshirriff • 69,824 subscribers

No longer active on Twitter. Bsky: @righto.com; Mastodon: @[email protected]

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How did Russian cosmonauts know where they were? The Globus INK (1967) showed the position of their Soyuz spacecraft on a rotating globe. It is an analog computer built from tiny gears. I reverse-engineered the wiring (which inconveniently had been cut) and we powered it up. 🧵

How did Russian cosmonauts know where they were? The Globus INK (1967) showed the position of their Soyuz spacecraft on a rotating globe. It is an analog computer built from tiny gears. I reverse-engineered the wiring (which inconveniently had been cut) and we powered it up. 🧵

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The Bendix Central Air Data Computer is a gear-based analog computer used in 1950s fighter planes. It computed "air data" such as airspeed, Mach number, and temperature. We finally got it operational, hooked it up to some instruments, and got turning gears and spinning dials.
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The Bendix Central Air Data Computer is a gear-based analog computer used in 1950s fighter planes. It computed "air data" such as airspeed, Mach number, and temperature. We finally got it operational, hooked it up to some instruments, and got turning gears and spinning dials.

Ken Shirriff

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