This paper presents the dynamic characteristics of the Junkers-type hydraulic dynamometer which is used for the performance test of prime movers, such as gasoline engines.
It is well known that the Junkers-type dynamometer has not only a simple construction but low inertia rotational parts. So it is suited to the performance test of high speed movers.
In this paper, the author analyzes characteristics of the hydraulic dynamometer referred to its absorption-torque and he evidences the nonlinear characteristics of hydraulic dynamometer.
The result of this theoretical analysis fairly well coincides with that of experimental result. Therefore, theoretical analysis may be used to synthesis of the speed regulater for dynamometer.