Abstract
Flight organisms generate the lift according to the flapping motion.However,the mechanism of production of lift is not clarified sufficiently.So a lot of researchers studied the mechanism of production of lift until now.Therefore,it is important for production of lift to generate the vortex ring on the flight organism wings.However,the relationship between vortex ring and lift is not clarified.The purpose of the present study is to clarify the dynamic lift generated by butterfly wings.
