What is DADC on Boeing 737? (Digital Air Data Computer)

The Digital Air Data Computer (DADC) is an essential component of the Boeing 737 aircraft, responsible for collecting, processing, and providing accurate and reliable air data to various systems on board. This advanced computer system plays a critical role in ensuring the aircraft operates efficiently and safely.

The DADC is designed to continuously monitor key air data parameters such as altitude, airspeed, and angle of attack. By collecting and processing this information in real-time, it enables the aircraft’s flight instruments, autopilot, and other systems to accurately respond to changes in flight conditions.

With the advancements in technology, the DADC has evolved from traditional mechanical systems to more sophisticated digital systems that offer increased reliability, accuracy, and functionality. The digital nature of the DADC allows for better integration with other avionics systems, enabling seamless communication and data sharing.

How Does the Digital Air Data Computer Work?

The Digital Air Data Computer works by utilizing various sensors located on the exterior of the aircraft to gather air data. These sensors include static ports, pitot tubes, and angle of attack vanes. The static ports measure static pressure, while the pitot tubes measure total pressure and angle of attack vanes measure the angle between the wing and the direction of the airflow.

These sensors feed the collected data to the DADC, which is responsible for processing and interpreting the information. The computer then calculates critical parameters such as altitude, airspeed, and angle of attack based on the input received from the sensors.

Once the data is processed, the DADC sends the calculated values to various systems on the aircraft. For example, it provides the flight instruments with accurate altitude and airspeed readings, allowing the pilots to have precise information about the current flight conditions.

Additionally, the DADC also shares the air data with the autopilot system, which uses this information to control the aircraft’s flight trajectory. By continuously adjusting the control surfaces and engines based on the air data, the autopilot ensures the aircraft stays on its desired course and maintains stable flight.

The Advantages of Digital Air Data Computer

The utilization of digital technology in the Air Data Computer offers several advantages over its mechanical counterparts. Some of these advantages include:

1. Increased Accuracy: Digital Air Data Computers are capable of providing highly accurate air data with minimal errors. The use of digital algorithms and advanced processing techniques ensures precise calculations and reliable output.

2. Improved Reliability: Digital Air Data Computers are more resistant to mechanical failures and environmental factors that can affect the accuracy of the data. The digital components are less prone to wear and tear, resulting in increased reliability and reduced maintenance needs.

3. Enhanced Functionality: With the integration of digital systems, the Air Data Computer can interface with other avionics systems, allowing for seamless data sharing and communication. This enables more advanced functionalities like data fusion, where multiple sources of air data can be combined for even higher accuracy and redundancy.

4. Efficient Calibration: Digital Air Data Computers can be calibrated more easily and accurately compared to mechanical systems. With digital calibration methods, adjustments can be made without physical modifications or recalibration of mechanical components, saving time and resources.

Overall, the Digital Air Data Computer plays a crucial role in ensuring the safety and efficiency of the Boeing 737 aircraft. By providing accurate and reliable air data to various systems on board, it enables smooth operations and allows pilots to make informed decisions during flight. The advancements in digital technology have significantly enhanced the capabilities of the Air Data Computer, making it an indispensable component of modern aircraft.

For More: What is DFDAU on Boeing 737? (Digital Flight Data Acquisition Unit)