Vassilopoulos and Mandel 



kho 



khc 



1.6 



1.4 



1.2 



1.0 



0.8- 



0.6 



0.4 



0,2 



0.0 



0.6 



0.9 



1.2 



+150 

 +100 

 + 50 a 



UJ 



o: 

 w 



UJ 



o 

 -50" 



♦ 

 -100 "" 



-150 



1.8 



Fig. 57 - Model G in directly astern seas, pitching 

 non-dimensional amplitude and phase angle vs 

 wavelength to shiplength ratio 



314 



