Aerodynamics Theories and Flight Performance Estimation of eVTOL Aircraft

The author developed a synthesis process based on the theories of rotorcraft and fixed wing to estimate the eVTOL aircrafts, which commonly adopt multiple rotors for vertical flight, and propeller and wing for forward flight. Momentum theory analysis and blade element analysis have been well used to analyze flight performance of rotor. Using the synthesis theory, this study investigated flight performance of 12 eVTOL aircrafts including multicopter, lift + cruise, and vectored thrust categories. Flight profiles of driving motor, rotor, and airframe at hovering, climb and descent, and forward flight were estimated. Specifications of the electric propulsion system are defined to match the propeller or rotor in order to satisfy the flight mission.