Vlater-Jet Propulsion for High-Speed Surface Ships 



PROPULSIVE 



COEFF. 



7>p 



Subcovitoting Propeller 



Net efficiency Stroiqht-Flow-Jet Propeller 



Supercovitoting Pr jpeller 



10 20 30 40 50 60 70 80 90 100 



DESIGN VELOCITY- KNOTS 



Fig. 1 Practical propulsive coefficient comparison 



Cavitation limit 



Constant shaft power 



Fig. 2 Definition of peak thrust ratio 



23 



