自航試験用推進器動力計

概要

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Since the propulsive performance of a ship is predicted by the result of self-propulsion test, the high reliability is required for inboard propeller-dynamometer. As the construction is simple and the inertia is small, the present propeller-dynamometer gives very reliable results of self-propulsion tests in waves as well as in smooth water. The following is specially noticeable among many features of this instrument. Im general, the torque, caused by the friction of rotating system, which varies with load and revolutions, is present in the torque-reading of dynamometer, so it is necessary to carry out brake-test, which requires no little time and labour. When the present dynamometer is used, the daily brake-test can be replaced by the static test of the spring used, since the friction-torque has varied with revolutions only, as expected by its construction. Though the method of recording torque electrically is of Author's invent, the method of recording thrust is under investigation.
社団法人日本船舶海洋工学会の論文
1939-09-15