Air Berlin validates noise abatement approaches
Air Berlin is validating new noise abate-ment approach procedures as part of a joint research project conducted by the German Aerospace Centre (DLR), Deutsche Flugsicherung GmbH (DFS) and Fraport AG.
On 6 September one of Air Berlin’s Boeing 737-700s will be carrying out 13 different approaches at the DLR research airport at Braunschweig-Wolfsburg, while noise measurements are recorded on the ground.
Effective noise abatement can be achieved on the one hand by noise avoidance, and on the other by noise transfer. To this end Air Berlin is testing curved approaches to avoid over-flying residential areas in future. The re-search flights in Braunschweig (Brunswick) will be simulating approaches to Frankfurt am Main airport. The volume of air traffic at Germany’s busiest airport does not permit reduced-noise approaches to be tested there.
Noise transfer, however, is possible by delaying the descent. This will involve Air Berlin’s Boeing adopting a steeper glide slope than the typical one of three degrees. Not only will the noise levels be measured during the validation flights, but the impact of the noise control procedures on the aircraft and the operational procedures carried out by the crew will also be scrutinised.
Air Berlin will be using the new GLS (Global Positioning and Landing System) for these validation flights in Braunschweig. In contrast with the conventional instrument landing system (ISL), which only permits straight approach paths, GLS also enables the aircraft to skirt residential areas and to fly steeper approaches.