I'm trying to understand the output of clockwork coils in joules or watts for different coils. You know the pullback car or windup pocket watch mechanism. I have heard it also called power in the barrel.
I found this below image as is the best approximation of the power output, but I don't know the coil size, or how to determine the size of a coil barrel for a particular out requirements.
Question, how to determine output of a clockwork motor of given sizes?