In the current study, the aerodynamic performance of fabricated eagle wings was experimentally and numerically investigated. In this respect, wings were designed by imitating the bionic eagle wing and fabricated using a 3D printer. The wings were then tested in a wind tunnel at different flapping frequencies, bending deflection angles, angles of attack, and forward flight velocities. As the key parameters, lift force and input power were compared between eagle wings and simplified wings. The results revealed that the eagle wing led the lift force to be improved by 14% on average compared to the simplified wing, with the largest improvement of 45%. Further, the input power of the simplified wing mechanism was greater than that of the eagle wing. Numerical simulations were performed to study flow physics. After validating the numerical results against the experimental results, the lift force and pressure contours were compared between the eagle and simplified wings. The results of the numerical simulation revealed that the pressure difference between the upper and lower surfaces of the eagle wing was higher than that of the simplified wing; therefore, the lift force produced by the eagle wing was larger than that of the simplified wing.

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