Abstract: A system for driving a mechanical load, comprising: a rotational motor; a pendulum affixed to a pendulum axis to allow oscillation and rotation of the pendulum about the pendulum axis; a rotary encoder configured to generate an encoder signal responsively to an angular position of the pendulum with respect to the pendulum axis; a controller configured to receive the encoder signal and responsively to generate first and second controller signals, wherein the first controller signals are indicative of an angular speed of the pendulum being within a predefined motor engage range, and wherein the second controller signals are indicative of the angular speed of the pendulum being above a predefined load engage speed; a first clutch configured to receive the first controller signals and responsively to engage the motor and the pendulum axis; and a second clutch configured to receive the second controller signals and responsively to engage the pendulum axis and the mechanical load, wherein the mechanical load is a l