What is OUTB on Airbus A320? (Outboard)

The Airbus A320 is a popular narrow-body aircraft that has been revolutionizing the air travel industry since its introduction in the late 1980s. With its innovative design and advanced technology, the A320 has become a favorite choice for airlines around the world. One crucial component of the A320’s structure is its outboard wing. In this article, we will explore what outboard means in the context of the Airbus A320 and understand its significance in the overall performance and safety of the aircraft.

Understanding the Outboard Wing

The outboard wing of the Airbus A320 is the section of the wing that spans from the wingtip to a certain point towards the fuselage. It is the outermost part of the wing and plays a vital role in the aircraft’s stability, control, and lift generation. The A320’s wings are designed to be highly efficient, providing optimal performance in various flight conditions.

The outboard wing features several distinctive elements, including:

  • The wingtip, also known as the winglet, is the curved, upturned end of the wing that helps reduce drag and improves fuel efficiency. It counters the drag caused by the vortices that form at the wingtip during flight.
  • Flaps, which are movable surfaces on the trailing edge of the wing, provide additional lifting capability during takeoff and landing. By extending the flaps, the wing increases its surface area, allowing for a slower approach speed and a shorter landing distance.
  • Ailerons, located on the outboard section of each wing, are control surfaces that move in opposite directions to create roll and initiate turns. They play a crucial role in maneuverability and maintaining lateral stability.

The outboard wing is also where various sensors, antennas, and systems are installed to assist with navigation, communication, and safety functions. These components ensure the aircraft can operate efficiently and safely throughout its flight.

Importance of the Outboard Wing

The outboard wing is a critical part of the Airbus A320’s design that contributes to the aircraft’s overall performance and safety. It is designed with precision to ensure optimal aerodynamic efficiency and stability in flight.

One of the key benefits of the outboard wing design is its ability to reduce drag. The winglet at the wingtip helps minimize the vortices that form during flight, reducing induced drag and improving fuel efficiency. By reducing drag, the outboard wing design enables the A320 to fly more efficiently, saving fuel and reducing emissions.

Addition the aerodynamic benefits, the outboard wing also contributes to the aircraft’s overall lift generation. The flaps and ailerons on the outboard wing allow the pilot to adapt the wing’s shape and maximize lift as needed during different phases of flight.

During takeoff and landing, the extended flaps increase the wing’s surface area and enhance its lifting capability. This enables the aircraft to fly at slower speeds and have a lower stall speed, ensuring a safe and smooth touchdown. In contrast, during cruising or high-speed flight, the flaps are retracted, reducing drag and improving fuel efficiency.

The ailerons on the outboard wing are crucial for controlling the aircraft’s roll and bank angles. By moving in opposite directions, they create a differential lift across the wings, allowing the aircraft to bank and maintain stability during turns. The precise control provided by the ailerons ensures safe and efficient maneuverability, even in adverse weather conditions.


The outboard wing on the Airbus A320 is an essential component that plays a crucial role in the aircraft’s aerodynamic efficiency, stability, and control. Its design and features, including the winglet, flaps, and ailerons, contribute to the aircraft’s overall performance, fuel efficiency, and safety.

By understanding the significance of the outboard wing, aviation professionals can appreciate the complexity of the A320’s design and the engineering efforts involved in creating an efficient and reliable aircraft. With its innovative features and advanced technology, the Airbus A320 continues to be a frontrunner in the aviation industry, providing airlines and passengers with a comfortable, safe, and environmentally-friendly flying experience.

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