What is the primary function of the horizontal stabilizer?

The primary function of the horizontal stabilizer is to provide pitch stability to the aircraft. This component is crucial in maintaining the overall aerodynamic balance by ensuring that the aircraft's nose is held in a desired position during flight. When the aircraft is in straight and level flight, the horizontal stabilizer generates a downward aerodynamic force that counteracts the lift produced by the wings and stabilizes the pitch attitude.

By maintaining this balance, the horizontal stabilizer prevents excessive nose-up or nose-down attitude, which could lead to potential control issues. This stability is particularly important during various phases of flight, such as takeoff and landing, as it helps the pilot maintain proper control over the aircraft's attitude and ensures a smooth flying experience.

In contrast, while other functions like roll and yaw control, speed enhancement, or fuel distribution are important aspects of flight dynamics and operation, they are not the primary role of the horizontal stabilizer. The essential purpose remains focused on controlling pitch and maintaining stability in flight.