Vassilopoulos and Mandel 



1.6 

 1.4 

 1.2 

 1.0 



.-r'o.e 



0.6 

 0.4 

 0.2 

 0.0 



kh, 



0.6 



0.9 



1.2 

 X/L 



+150 

 + 100 

 + 50 S 



Q 



- 50 

 -100 

 -150 



1.5 



1.6 

 I .4 

 1.2 

 1.0 



0.6 

 0.4 

 0.2 

 0.0 



0.6 



0.9 



1.2 

 X/L 



+ 150 

 + 100 

 + 5o5 



LlI 



(E 



'^ 



u 



Q 



- 50 ~ 



* 



-100 "" 



-150 



Fig. 37 - Model E in directly ahead seas, pitching 

 non-dinnensional amplitude and phase angle vs 

 wavelength to shiplength ratio 



294 



