In order to regulate the engine is running the influence of centrifugal force not only to leave the field, which would mean that you can do to tackle the engine at all hard, but could be much less get under way, a spiral spring R is present, which counterbalance the action of the game is the balls, and this can only come into play when the centrifugal force is greater than their own. From the outset, the clamping force of this spring is to gauge the designer so that the motor is obtained in a normal number of tour G50