Table 1.

Flow behavior over the surface of the flipper model during all speed trials

Wind tunnel speed (m s–1)Stall angle (°)Maximum CLAngle of max. CL (°)Minimum CDAngle of min. CD (°)Reynolds nos (air)Swimming speed (m s–1)
17.4+12°–18*1.62+12°0.02+2 to +41710020.7
25.9+10°–20*1.55+10°0.04+22541001.7
30.4+10°–20*1.50+10°–0.014+42982492.3
34.4+10°–20*1.48+10°0.04+23374922.9
45.6+8°–20*1.41+14°0.04+24473735.1
60.4+6°–18*1.27+14°0.060 to +25925748.9
  • CL, coefficient of lift; CD, coefficient of drag

  • * Partial stall