Algodoo

No motors drive the normal running of the clock. It is driven by a spring. The only motors are for setting the time and for winding up the clock.
This clock was based on Brian Law's clock #12. But unlike the original clock idea, this one can run for over 24 hours per winding, while the original prototype only 12 hours.
This clock is one of the longest running mainspring powered clocks on Algodoo.
Accuracy: several seconds per hour, gains a few seconds per hour when fully wound, loses several seconds per hour when almost needing a winding.
The best accuracy would be around 12 hours after winding and before the next one. This is because spring-wound clocks run faster when fully wound than when needing a winding, because the spring's force decreases as it unwinds.

To start the pendulum up again if it has stopped, press k.