The system for adaptively governing a speed of a rotor assembly in an aircraft can include a processor configured for comparing receivable data to limit data in an algorithm and subsequently making one or more commands that affect the speed of the rotor assembly, the algorithm being configured for analyzing power available during operation of the aircraft. The method can include calculating a first power available by comparing an actual transmission torque to a transmission torque limit; calculating a second power available by comparing an actual engine exhaust temperature to an engine exhaust temperature limit; and comparing the first power available to the second power available.