曳繩釣用板状潜入板の力学的特性

抄録

With the purpose of determining the mechanical characteristics of trolling depressors, a series of experiments on plate depressors has been carried out in a water tank. From the equations (1)-(4) representing the balancing of the plate and the results obtained by the experiments, the drag coefficient C_D, the lift coefficient C_L, the moment coefficient C_M, the distance, a, from the front edge of the plate to the point through which the hydrodynamic pressure acts, and the direction of the pressure were determined, The results were plotted against the angle, α, of attack in Figs. 3-4. Although a few differences among the characteristic curves of these plates is seen, a remarkable increase in the value of C_M, with the decrease of taparing angle at the bow can be noticed, This f act may increase the stability of the depressor in its warking condition.