Multicopter inflight measurement data of flow field and structure states

The aim of the investigation was to obtain practical experience and first results from the measurement of highly dynamic processes in the flow around multicopters and their structural reactions.

During initial flight tests of a newly developed multicopter UAS (uncrewed aircraft system, 4 rotor configuration) with 25 kg maximum take-off weight a high frequency data acquisition system with different sensors was flying piggyback. Already existing sensors were used, as no funding for dedicated additional payload was available. Sensors were concentrated at one rotor arm. The data acquisition was limited to 8 channels, so different sensor combinations were flown in experimental configurations. Trajectories followed the needs for the multicopter flight testing and were not tailored for this investigation.