CM 

 X 

 X 



_J 



x '._ 



in 



CE 



□ - STRIP THEORY 



o - SLENDER-BODY THEORY 



+ - THREE-DIM. THEORY 



CD 





LD 





O 





X rj 





X 





_J 





X 





CD 





• • 





X 





_] 



X 



z: o" 





\ 





m 





m 





en 





o 





4- 



1.0 2.0 3. 



NON-DIM, FREOUENCY 



4.C 



Figure 4 - Pitch Added-Mass and Damping Coefficients of Twin 

 Ellipsoid in Head Seas at Zero Speed 



17 



