This video addresses general operational principles that apply to all aircraft propellers as well as specific characteristics of constant speed propeller designs and the specific operational principles of the PT6 propeller governor system. These systems are utilized on Beechcraft 1900, Starship, King Air C90, B200, B300, Pilatus PC21, PC12, PC 9, PC 7, PC 6, Air Tractor AT 400, AT 502, AT 602, AT 802, Cessna 208 Caravan, Shorts 360, T6A Texan II, and many others.