Fig. 3. Lift (blue) and drag (red) coefficients per wing during a two-winged fling half-stroke are plotted for two mesh widths. The coarser grid (dotted line) has a mesh width of about 8.33 x10^–4 m (the same mesh width as the other simulations in this paper), and the finer grid (solid line) has a mesh width of about 4.17 x10^–4 m. The two grid sizes show good agreement with small deviations occurring during the rotational part of fling.