The Variator illustrates the physics and engineering behind variable ratio transmissions, where rotational speed and torque output are controlled by changing pulley diameters. As the belt shifts along the cone shaped pulleys, the effective radius of each pulley changes, altering the transmission ratio. This determines how fast the driven pulley rotates relative to the driving one.

By manually adjusting the belt position using the built‑in pedal mechanism, users can see how smoothly a CVT transitions between high torque/low speed and low torque/high speed states. When connected to the Tachometer model, the system vividly demonstrates the direct relationship between transmission ratio and RPM mirroring how modern scooters, industrial machinery, and some hybrid vehicles manage power and efficiency.