Ship Form of Minimum Wave Resistance 



5.0X10"- 



Figure 15 



Cw = Vy^"^' 



where 2B is the mean breadth, becomes 0.32612 and for a ship with 4th power 

 section, it is 0.35665. The corresponding value for a semi-submerged ship of 

 minimum wave resistance at Froude number 0.4 was calculated. It was found to 

 be 0.08837, and a considerable reduction of the wave resistance is achieved. 



The experiment of the semi-submerged ship was conducted under a finan- 

 cial support by Uraga Heavy Industry Co. Ltd. The author wishes to express 

 his gratitude. 



REFERENCES 



1. Weinblum, G., "Schiffe geringsten Wider standes," Proc. 3rd Internat. 

 Congr. Appl. Mech. Stockholm (1930) 



2. Krein, M. G., Doklady Akademi Nauk SSSR, Vol. 100, No. 3, 1955 



Kostchukov, A. A., "Theory of Ship Waves and Wave Resistance," Lenin- 

 grad, 1959 



3. Bessho, M., "Wave-free Distributions and Their Applications," Inter- 

 national Seminar on Theoretical Wave Resistance, University of Michigan 

 (1963) 



1045 



