Gregory's ServerAn amplifier board uses transistors and magnetic amplifiers to drive the motor that turns the shaft. They didn't use a printed circuit board, but components soldered to metal pegs. Here's the schematic I reverse-engineered. 8/12
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 For more information, see my blog post: https://www.righto.com/2024/02/reverse-engineering-analog-bendix-air.html 10/12 You can see the Bendix CADC in action in this thread: Credits: thanks to Joe for providing the CADC. I worked on it with https://twitter.com/curious_marc and https://twitter.com/TubeTimeUS; Marc made a video of the CADC:  @foma_econlodge The CADC computes airspeed, Mach number, temperature, air density, and other "air data". |
The CADC is a boring cylinder from the outside. You wouldn't expect that amazing mechanical complexity would be found inside. 9/12