  The dynamics of driven, damped pendulum as used in mechanical clocks is
numerically investigated. In addition to the analysis of a well-known
mechanisms such as chronometer escapement, the unusual properties of Harrison's
grasshopper escapement are explored, giving some insights regarding the
dynamics of this system. Both steady state operation and transient effects are
discussed, indicating the optimal condition for stable long-term clock
accuracy. Possibility of chaotic motion is investigated.
