The kinematics analysis of webbed feet during cormorants' swimming

To reveal the flippers propulsion and the self-adjustment mechanism, which can be used to inspire the design of submersible aircraft. This article makes some research on the bionic observation on the movement of cormorant's flippers during the surface take-off process, bringing forward a flippers propulsion theory, which there is a new undulate propulsion besides the common flapping propulsion. Observation use the video image processing technology to analyze the trajectory of cormorant' flippers and the forced characteristics, revealing the mechanism of effective propelling force of cormorant's flippers. It provides a new train of thinking for people to develop the submersible aircraft with high efficiency.