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Fig. 5. Force traces for different amplitudes. (A) Experimental force coefficients for advanced rotation ({varphi}={pi}/4) and three stroke amplitudes, A0/c=2.8 (red), 3.6 (blue) and 4.2 (green). (B) Computational force coefficients for the same parameters. The time is normalized with the flapping period. The force is normalized by the maxima of the corresponding quasi-steady forces.