HYDRODYNAMIC SPEED REDUCERS FOR SHIP DRIVE. PART A. THE GENERAL PROBLEM OF HYDRODYNAMIC SPEED REDUCERS FOR SHIPS WITH PARTICULAR ATTENTION TO INCREASED RATIOS OF TRANSMISSION. PART B. EXPERIMENTAL INVESTIGATION AND THEORETICAL ANALYSIS OF AN AXIAL FLOW PRIMARY STAGE FOR HYDRODYNAMIC SPEED REDUCERS
JOHNS HOPKINS UNIV BALTIMORE MD INST FOR COOPERATIVE RESEARCH
The investigations revealed that hydrodynamic speed reducers of the Foettinger-transformer type offer a practical way of speed reduction under conditions which render mechanical reduction gears unsatisfactory. The indicated efficiencies of the reducers varied from about 90 at transmission ratios below 5, to about 82 to 85 at transmission ratios above 15. The size and weight of hydrodynamic transmissions appeared to compare favorably with other types of transmissions, particularly at high powers and high speeds.