This study uses the vortex ring aerodynamic model to predict the power requirements for flapping wing flight as a function of airspeed. The model uses wingbeat kinematics and vortex circulation intensity to describe the shape and orientation of each vortex ring. An instrumented flapping wing aerial vehicle is used to provide in-flight measurement of power consumption by the drive motors, vehicle attitude, wing tracking, and altitude and airspeed data. Data from flight testing trials are compared to the vortex ring power model and the utility of the model predictions is explored. The agreement between the model and flight testing results is acceptable, however several challenges are highlighted in the application of the model to practical design efforts.
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