HYDRODYNAMIC DEVELOPMENT OF A HIGH SPEED 

 PLANING HULL FOR ROUGH WATER 



Daniel Savitsky 



Stevens Institute of Technology 



Hoboken, New Jersey _, U.S.A. 



John K. Roper 



Atlantic Hydrofoils } Inc. 



Hancock, N.H. U.S.A. 



Lawrence Benen 



Naval Ship Systems Command 

 U.S. Navy, U.S.A. 



ABSTRACT 



The hydrodynamic development of a new planing 

 craft intended for sustained high-speed operation 

 in a seaway is discussed. The design philosophy is 

 presented and then implemented to achieve optimum 

 hull form and loading for both smooth and rough 

 water operation of the craft. The resultant hull form 

 is a high length-beam ratio, highly loaded, double 

 chine configuration which provides greatly improv- 

 ed seakeeping, high speed and high maneuverabili- 

 ty. 



Extensive model tests were conducted to predict 

 the SHP ; EHP ; seakeeping ; course -keeping sta- 

 bility ; and turning characteristics of the design. 

 The extensiveness of the model test program and 

 data analysis are unique for a planing craft. These 

 results are presented in a form which should be of 

 general interest to the designers of a high-speed 

 planing craft. 



INTRODUCTION 



Although world navies are traditionally considered to be high 

 sea state fleets with ocean- spanning capabilities, the small, high- 



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