可変ピツチ推進器船の操縦性について-I(日本航海学会第33回講演会)

概要

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It is a well-known fact that variable pitch propeller improves the performance of the maneuverability of ship such as the propulsive efficiency, the control of speed either going ahead or stern, etc. In the variable pitch propeller, there are two controllable factors by which it is possible to make the ship go at a given speed ; namely, the number of revolution is defined by the pitch angle or vice versa. The author conducted a series of field experiments using a fishing boat, in an attempt to clarify the relation between the pitch angle and the maneuverability of the ship going at a given speed. Among many factors of maneuverability of the ship, the turning ability was analyzed in this report, and the following results were obtained: 1. The reduction in speed of ship during stationary turning towards starboard was larger than that towards port. And the speed reduction was out of relation to the pitch angle of propeller. 2. The better results in turning ability was brought by the smaller pitch angle, i.e. by the faster revolution. 3. The turning circle towards starboard was smaller than that towards port when the rudder angle was the same, but larger when the slip ratio of propeller was the same. 4. The larger slip ratio brought the better result in turning ability at small rudder angle.
社団法人日本航海学会の論文
1965-12-25