Fig. 13. The average lift coefficients per wing during translation following two-winged fling divided by the corresponding average lift coefficients for one-winged fling vs Reynolds number (Re). The average lift coefficients following fling were calculated as the average lift coefficients generated after rotation and translational acceleration and during translation at a constant angle of attack. This value decreases with increasing Re, suggesting that the lift enhancing effects of clap and fling are more significant at lower Re.