Oscillating plunging motion is one of the fundamental motions which comprise the
kinematics used by many flying and swimming organism for locomotion. It is characterized
by the frequency and amplitude of oscillation. Past studies have investigated this motion for
relatively small amplitudes. In this paper we investigate reduced frequencies 0.25≤ k≤ 16
and plunge amplitudes 0.03125≤ h≤ 8 to give plunge velocities ranging from 0.25≤ kh≤ 4
at Re= 100. It is found that unlike previous investigations for small plunge amplitudes, thrust …