Why the need for a perfect gyroscope that can spin for 24 hours? Why not use a motor to counteract the slow-down without affecting the rotation? Science museums

Why the need for a perfect gyroscope that can spin for 24 hours? Why not use a motor to counteract the slow-down without affecting the rotation? Science museums sometimes do this to their Foucault Pendulums so they don't need to keep re-swinging them: https://www.pugetsound.edu/about-puget-sound-0/leadership/2023-master-plan/projects/science-center/science-display/foucault https://www.pugetsound.edu/about-puget-sound-0/leadership/20...