Vassilbpoulos and Mandel 



1.6 

 1.4 

 1.2 

 1.0 

 -^0.8 

 0.6 

 0.4 

 0.2 

 QO 



+150 

 + 100 

 + 50 

 

 -50 

 -100 

 -150 



0.6 



0.9 



1.2 

 X/L 



1.5 



1.6 



I .4 



1.2 



1.0 



-^0.8 

 kh, 



0.6 

 0.4 

 0.2 



ao 



0.6 



0.9 



+150 

 +100 



+ 5o5 



tr 

 ^ 



UJ 

 Q 



-100 

 -150 



1.2 

 X/L 



1.5 



1.8 



Fig. 45 - Model F in directly ahead seas, pitching 

 non-dimensional amplitude and phase angle vs 

 wavelength to shiplength ratio 



302 



