手のひらと前腕部から発生する水泳自由形における推進力比率(水泳)

抄録

The propelling force in swimming is mainly generated by a hand, although the ratio of the propelling force is not certain whether from the hand or from the whole part of forearm. Replicas of a hand and an arm were produced from a same excellent swimmer. Those characteristic of lift-drag forces and propelling force ratio were taken out by wind tunnel tests based on angle of attack and sweepback angle (horizontal driving angle). As a result, it turned out that the propelling force of the whole arm was set about from 3 to 4 times larger than that of only a palm in the catch and the finish phase of S-shaped pull, and that it was about 1.8 times larger at the pull phase of S-shaped and drag pull swimming.