o 





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n 



* 





CD 



ui 



X 





z: 





\ 





;_n 





o 





X 





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OJ 



_J 





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□ - STRIP THEORY 



o - SLENDER-BODY THEORY 



+ - THREE-DIM. THEORY 



•l.C 2.0 3.0 



NON-DIM, FREQUENCY 



4.0 



Figure 3 - Heave Added-Mass and Damping Coefficients of Twin 

 Ellipsoid in Head Seas at Zero Speed 



16 



