国鉄型船舶主軸推力計について

概要

論文の詳細を見る
In January 1961,JNR was granted a patent for "transmission shaft with thrust measuring unit". This patent was applied for the port main shaft of the Tsugaru-maru, a newly-constructed ferryboat plying between Aomori and Hakodate. This is the first successful application in the world of a thrustmeter in large ships. This thrustmeter has been so designed as to be able to withstand safely up to 0.1 million repetitions of the severest change imaginable. The strength and rigidity to bending and torsion of this unit have been found more than equal to those of other common intermediate shafts. The thrustmeter proved sensitive enough as planned; and the stability of zero base and sensitivity was found extremely good. The measurements of thrust and torque of Tsugaru-maru in the official speed test between mile-posts showed that the efficiency of the ship's controllable pitch propeller was higher than expected.
社団法人日本船舶海洋工学会の論文