The dynamometer contains one perforated disc, which rotates in a housing between a similar set of perforated stators. Cold water enters the rotor chamber at the center. The water is accelerated by the rotating disc and thrown outwards by centrifugal action. From the outer diameter of the rotor chamber inwards, the water forms an annulus that rotates at approximately half the disc speed. Hot water is discharged through a hole located at the bottom of the housing.
Power is absorbed through the turbulent motion developed inside the device.
The resulting drag acts as a resistance to rotation and tends, with an equal effort, to turn the dynamometer housing. The housing is restrained from turning by a load cell, which is mounted at a fixed distance from the centerline of the dynamometer. This load cell measures the output torque of the engine. A. First, familiarize yourself with the various control valves for the engine and dynamometer. You are now ready to start your engine.