it with an exact numerical mean-speed correction, computed by the finite- 

 element method for both a towing tank experiment and a wind tunnel experi- 

 ment. The two predictions are shown to be in good agreement for both 

 facilities. It is shown that the effect of added mass coefficient on the 

 speed correction of a body is very significant as the blockage effect in- 

 creases. It is also found that the main difference in the total resistance 

 coefficient measured in a large and a small towing tank is due primarily 

 to the difference in the model wave resistances computed for the two tanks. 

 Further investigation is necessary to take into account other blockage 

 corrections due to viscous effects such as flow separation and wake dis- 

 placement thickness effects. 



ACKNOWLEDGMENT 

 The author would like to thank Mr. Justin McCarthy for suggesting 

 this problem and for his encouragement during the work. 



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