content_image/586205.jpg
<img src='content_image/586205.jpg'>

the governor counterweights and the tension on the speeder spring are equal; the propeller blades are not moving or changing pitch. If something happens to unbalance these forces, such as if the aircraft dive or climbs, or the pilot selects new rpm range through the propeller control (changes tension 

on the speeder spring), then these forces are unequal and an underspeed or overspeed condition would result. A change in rpm comes about in the governing mode by pilot selection of a new position of the propeller control, which changes the tension of the governor speeder spring or by the aircraft 

