Fig. 11

Counter-phase FT-I flapping: (a) Slice plane and iso-surface at 0.4c, (b) Slice plane and iso-surface at 0.5c, (c) Upstream and downstream foils with sectional slicing, (d) Variation of induced thrust spanwise, (e) Slice plane and iso-surface at 0.2c, and (f) Slice plane and iso-surface at 0.8c.