He came upon a set of cockpit indicators from a Cold War-era RAF airplane — sorry, “aeroplane” — that used a magnetically driven rack and pinion ... in a nice plastic enclosure.

Rack Racks are straight components with gear teeth. They mate with pinions (spur gears) and are typically straight-toothed. Pinion Pinions are used to drive racks or larger gears. They can be ...

But while these systems rely on different sources of power, they often function using similar gears and components, including ...