Final answer:
A power-off stall during a turn in aviation is practiced at a reduced airspeed, not at an ideal speed intended for maximum safe turning without support. The appropriate speed is generally suggested by aircraft manuals or instructors, and it is a speed that is above stall speed but below normal cruising speed.
Step-by-step explanation:
A turning power-off stall is an aviation maneuver typically practiced by student pilots to simulate a stall that occurs during a turn. The "ideal speed" refers to the speed at which an aircraft can execute a turn without additional support, meaning without excess power. It is similar to the concept that a vehicle has an ideal speed to negotiate a curve without relying on friction between the tire and the road for additional grip. However, in the context of the question, the ideal speed would likely not apply since the stall is initiated by reducing power and increasing the angle of attack until the aircraft can no longer produce lift and begins to stall. Instead, the maneuver should be performed at an airspeed recommended by the aircraft's operating manual or instructor, which is typically below the aircraft's normal cruising speed but above its stall speed.