<div class="section abstract"><div class="htmlview paragraph">The fixed-wing VTOL is a new type of aircraft that combines the advantages of
multi-rotor and fixed-wing aircraft. Enable freely taking off and landing, while
maintaining high flight speeds during cruising. However, higher requirements for
the powertrain system have emerged. The powertrain needs to adapt to the layout
of distributed propulsion devices while also ensuring sufficient endurance. Both
the full-electric powertrain and traditional fuel-based powertrain are unable to
meet this demand, making the hybrid-electric powertrain one of the most feasible
solutions currently available. A 10kW level hybrid-electric powertrain system
was designed for a fixed-wing VTOL aircraft. The power generation performance
tests are conducted to analyze the coupling working characteristics of the
engine and generator. The performance of the hybrid configuration and the
full-electric configuration in terms of power-to-weight ratio, energy-to-weight
ratio, and endurance are compared. The results indicate that the payload
capacity of the hybrid-electric system under the same range has increased by
52%, and the energy-to-weight ratio has improved by 16%, extending the endurance
of the flight platform from 51min to 67min. The findings demonstrate that the
hybrid-electric system can expand the performance capabilities of the aircraft
to fulfill a wider range of mission requirements.</div></div>