Very complex campaign

All instruments are connected to separate battery to avoid aircraft battery drain and radio interference. 5 pumps are making a lot of noise which is reduced by ANC (active noise cancelling) headsets but made disturbances on radio frequency. Finally with a lot of trials guys from Aerosol and Griša Močnik found solution. Then when we were almost ready for take-off very bad and cold weather postponed mission. During test flights we experienced aircraft technical problems which are more serious that we thought at the beginning. So at the moment we are grounded until further engine inspection.