What does Power Required indicate?

Power Required refers to the amount of torque that an aircraft needs to generate in order to either maintain a hover or execute specific maneuvers effectively. In aviation, especially in rotorcraft like helicopters, this concept is critical because it directly relates to the aircraft's performance in various phases of flight. During a hover, for example, the rotor system must produce enough lift to counteract the weight of the aircraft, and the amount of torque required to achieve this is quantified as Power Required.

Understanding this concept helps pilots and aircrew in making informed decisions about flight operations, including understanding limits and capabilities of the aircraft in various conditions. The other choices, while related to power and thrust characteristics, do not directly define what Power Required indicates in terms of torque needed for specific flight operations.