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 to swivel a set of prism-shaped pieces to ...

Part of a rack-and-pinion steering system, the rack is a bar parallel to the front axle that moves left or right when the steering wheel is turned, aiming the front wheels in the correct direction.

An example of this is in a hand drill, where the drive gear is larger than the driven gear. A pillar drill with a rack and pinion arrangement The speed at which a gear or wheel rotates is measured ...