> The clock movement supplies one unit of energy to the pendulum for each oscillation. A torsion pendulum oscillates about 8 to 20 times more slowly than a swin

> The clock movement supplies one unit of energy to the pendulum for each oscillation. A torsion pendulum oscillates about 8 to 20 times more slowly than a swinging pendulum. This represents a major savings in energy, enough to increase an 8-day running time to 64 to 160 days. This is way cool. Just looking around real quick, the first of these models were made in 1900: https://clockhistory.com/0/schatz/model-names/standard-400-day-clock/page1.html https://clockhistory.com/0/schatz/model-names/standard-400-d... I wonder what how this was discovered, measured, and tested. Making prototypes and measuring how long it lasts is obviously too time consuming.