Supplementary Material

JEB050716 Supplementary Material

Files in this Data Supplement:

• Supplemental Figure S1 -

  Fig. S1. Shapes of three plates: (A) rectangular, (B) triangular and (C) delta-shaped for a duck's feet.

• Supplemental Figure S2 -

  Fig. S2. Trapezoidal (blue solid line) and sinusoidal (red dashed line) angular velocity programs.

• Supplemental Figure S3 -

  Fig. S3. Shape effect on thrust generation for (A) trapezoidal and (B) sinusoidal angular velocity program cases (Re=19,720). Note that the y-axis value in these graphs is not the thrust coefficient, but the thrust measured by a load cell.

• Supplemental Figure S4 -

  Fig. S4. Comparison of non-dimensional impulse for the Re=19,720 and Re=140 cases in the (A) trapezoidal and (B) sinusoidal velocity programs.

• Movie 1 -

  Movie 1. Vortex structure of the rectangular plate in the trapezoidal velocity program (Re=19,720).

• Movie 2 -

  Movie 2. Vortex structure of the triangular plate in the trapezoidal velocity program (Re=19,720).

• Movie 3 -

  Movie 3. Vortex structure of the delta-shaped plate in the trapezoidal velocity program (Re=19,720).