What is OPP on Airbus A320? (Opposite)

When it comes to aviation, the Airbus A320 is a name that is widely recognized. As one of the most popular aircraft models ever produced, the A320 has become a favorite among airlines and passengers alike. However, have you ever wondered what is opposite on the Airbus A320? In this blog post, we will explore the various components and features of the aircraft that have an opposite counterpart, referred to as OPP.

The Opposite of Stability: Control Surfaces

Stability is a crucial factor in aviation, ensuring safe and smooth flights. The Airbus A320 achieves stability through a combination of aerodynamic design and control surfaces. These control surfaces are the exact opposite of stability, as they allow the pilot to control and maneuver the aircraft in various ways.

One of the key control surfaces on the Airbus A320 is the aileron, which plays a vital role in rolling the aircraft. Located on the trailing edge of the wings, there are two ailerons on each wing, one on the left and one on the right. When the pilot inputs a roll command, the ailerons move in opposite directions, creating a difference in lift between the wings and initiating the desired roll. This opposite movement of the ailerons on each wing allows for precise control and maneuverability.

Another essential control surface on the A320 is the elevator, responsible for pitch control. Positioned on the trailing edge of the horizontal stabilizer, the elevator moves in the opposite direction to adjust the aircraft’s pitch. When the pilot pulls back on the control column, the elevator moves upwards, causing the nose of the aircraft to pitch up. Conversely, when the pilot pushes forward, the elevator moves downwards, resulting in a nose-down pitch. The opposite movement of the elevators enables the pilot to control the aircraft’s pitch and maintain a desired angle of attack.

To complete the trio of control surfaces, the Airbus A320 also features the rudder, which aids in yaw control. The rudder is located on the vertical stabilizer at the tail of the aircraft. When the pilot applies rudder input, the rudder moves in the opposite direction, creating a yawing motion. This yaw control allows the aircraft to counteract adverse yaw and maintain coordinated flight.

The Opposite of Stillness: Systems and Equipment

While the Airbus A320 appears as a stationary behemoth on the tarmac, it is alive with countless systems and equipment, operating in perfect harmony to ensure a safe and efficient flight. These systems and equipment are the opposite of stillness, constantly in motion and working together to provide essential functions.

One of the most integral systems on the A320 is the hydraulic system. The aircraft features three independent hydraulic systems, each with its own set of pumps, reservoirs, and actuators. These hydraulic systems work in an opposite manner, providing redundancy and ensuring that even if one system fails, the others can still function. This redundancy is crucial for maintaining control of the aircraft, as the hydraulic system powers various flight control surfaces, such as the ailerons, elevators, and rudder.

In addition to the hydraulic system, the A320 relies on electrical systems to power essential components and equipment. The aircraft features generators that produce electricity to support various systems, including the flight control computers, avionics, lighting, and cabin services. In the event of an electrical failure, the A320 is equipped with opposite sources of power, such as the Auxiliary Power Unit (APU) and the Ram Air Turbine (RAT). These backup power sources ensure that critical systems remain operational even in the face of electrical issues.

Furthermore, the A320 incorporates an opposite concept through its use of redundant flight control computers (FCC). The aircraft is equipped with multiple FCCs that work in parallel, constantly cross-checking and providing backup to each other. This redundancy ensures that even if one FCC were to malfunction or encounter a problem, the others will continue working seamlessly, maintaining control and flight stability.

The Opposite of Silence: Engines and Thrust

The Airbus A320 may soar through the skies with elegance, but beneath its wings lie powerful engines that produce thrust, the opposite of silence. The A320 is powered by either CFM International CFM56 or International Aero Engines (IAE) V2500 engines, both capable of generating significant thrust.

The CFM56 engine, for example, is a high-bypass turbofan engine that delivers a thrust range of approximately 22,000 to 33,000 pounds. With its opposite power, it propels the aircraft forward at exhilarating speeds, allowing it to reach its destination efficiently. The IAE V2500 engine, on the other hand, offers a thrust range of around 22,000 to 33,000 pounds, further emphasizing the significant power these engines possess.

Despite the power of the engines, the Airbus A320 ensures the opposite by incorporating advanced noise reduction technologies. These technologies help to minimize the noise produced by the engines during takeoff, landing, and flight. By utilizing specially designed engine nacelles and exhaust systems, the A320 significantly reduces its noise footprint, thus striving to be a considerate neighbor in airport communities.

Additionally, to optimize fuel efficiency and reduce emissions, the A320 employs innovative features such as wingtip devices. These devices, commonly known as winglets, are located at the end of each wing and serve to reduce drag and improve aerodynamic performance. By reducing drag, the A320 can achieve higher fuel efficiency and minimize its impact on the environment, offering an environmentally-friendly opposite to its powerful engines.


The Airbus A320 is a marvel of engineering, designed to provide safety, efficiency, and comfort to passengers. Among its remarkable features are the control surfaces that enable precise maneuverability, the systems and equipment that work in perfect harmony, and the powerful engines that propel the aircraft forward. All these components and features have an opposite counterpart, showcasing the ingenuity and complexity behind the A320’s design.

Next time you board an A320, take a moment to appreciate the opposites that make this aircraft an incredible feat of modern aviation.

For More: What is RLSK on Airbus A320? (Right Line Select Key)