船の逆転停止性能について

抄録

An attempt is made to establish a simple method of calculating stopping ability of ships as expressed by head reach. The deceleration of a ship is determined by means of one dimensional equation of motion, by abandoning the attempt to satisfy the equation for the rotating system of engine-propeller combination. Assumptions are made that total resistance R is proportional to the square of the velocity and the constant astern thrust T₁ is instantaneously applied which is taken to be value at dead-in-the-water. The final equation of motion of ship can be expressed in the form
T_sdV/ds+V=-K_sn₁²,
and head reach can be obtained as
S=T_s log_e (1+ 1/K_s V₀/n₁²)
Thus if T_s, which is essentially the hull characteristic, and K_s, which denotes the propeller characteristic, are given, the corresponding head reach can be easily calculated.