In July 2012 the colleagues of DLR could finally close the flight test program of Trace Gas Inlets (TGI) for HALO, covering the whole flight envelope up to the maximum airspeed of mach 0,885. The program has been faced by difficulties caused by aerodynamic excitations at high speed regimes. The problems that arose during previous flights have been solved by carefully analysing the aerodynamic shape and developing airflow break-away edged trailing cover of the intake pylon. The so called “splitter plates” had been prototyped and documented for the flight test approval on short notice. Meanwhile the TGI320 and TGI430 are equipped with the “splitter plates” and even the combination of different mounting positions proved well.
The flight test are one important step toward the final certification driven by the DLR design office. enviscope contributed with the documentation of an substantiation of the inlet assembly including the modified aperture plate.