Investigation of a Three-Degree Decelerating Approach of a Twin Engined Jet Aircraft under Actual Flight Conditions

A current trend in noise abatement is exploiting the benefits of procedural means with computational aids, such as flap/gear scheduling algorithms and displays. This progress allows the execution and implementation of Advanced Noise Abatement Procedures (ANAPs) such as the Three-Degree Decelerating Approach (TDDA), that reduces the noise perceived by the community in the neighborhood of airports without sacrificing runway capacity. Previous research at Delft University of Technology (DUT) showed consistent performance of the TDDA procedure under various traffic conditions when pilot s are assisted by a flap/gear scheduling algorithm. This paper presents the results of a human-in-the-loop TDDA procedure under elaborate wind, turbulence and traffic condi tions. Pilot workload, pilot interactions with the TDDA algorithm and support interface, as well as operational performance were assessed in a full-motion base flight simulator. The whole was demonstrated successfully with a twin-engine jet aircraft.

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