Describe the function of "tail surfaces" in fabric-covered aircraft.

The function of tail surfaces in fabric-covered aircraft primarily revolves around providing stability and control during flight. The tail surfaces, which include the horizontal stabilizer and vertical stabilizer, play a crucial role in maintaining the aircraft's attitude and ensuring smooth flight.

The horizontal stabilizer is responsible for controlling pitch, which is the up-and-down movement of the aircraft's nose. The elevators attached to this surface allow the pilot to adjust the pitch angle, helping the aircraft ascend or descend as needed. Similarly, the vertical stabilizer, with its rudder, controls yaw, or the left-right movement of the aircraft's nose. Together, these surfaces ensure that the aircraft remains balanced and responds appropriately to pilot inputs, making maneuverability and stability in flight possible.

While tail surfaces may contribute marginally to the overall aerodynamics of the aircraft, their primary purpose is not to provide lift, reduce drag, or serve decorative purposes. Their design and position are specifically tailored to enhance control and stability, which are critical factors for safe aircraft operation. Thus, the essential role of tail surfaces in maintaining control over the aircraft during flight is what makes this answer the most accurate.