This paper deals with the process of electric machine development for aircraft with hybrid propulsion system. Electric generator power of 400 kW and rotational speed of 12000 rpm intended for aircraft with hybrid propulsion system passenger capacity of 9-19 seats was used as an example. The challenges for aerospace caused by the spread of COVID-19 was revealed. The problems that could arise from each design part are considered and their influence on the entire development process are analyzed. The influence of technological parameters in the prototyping on the accuracy of computer simulation is analyzed. The accident that occurred during the testing of the experimental sample and its causes are described.