Rotorcraft Low Noise Trajectory Design: a focus on RACER

International audienceAviation is heading towards more sustainability. In this context, this paper proposes a methodology to design low noise trajectories for rotary-wing aircraft. A dedicated algorithmic scheme is presented, embedding Airbus Helicopters internal noise footprint computation chain. This software is able to accurately model rotorcraft noise emission, and perform realistic impact assessment on population. The proposed optimization method has been tested on several real-world instances, predicting notable noise reductions by flying such optimized low noise procedures. Furthermore, additional acoustic gains can be obtained thanks to a supplementary degree of freedom brought by a new innovative rotorcraft configuration