Giddings and Wermter 



180 



160 



140 



120 



100 



80 



60 



40 - 



20 



0.100 



0.0224 



0.200 0.300 0.400 0.500 0.600 



Model Roll Frequency in cycles per second 

 0.0447 0.0671 0.0895 0.1119 0.1342 



Ship Roll Frequency in cycles per second 



Fig. 16 - Variation of phase angle between moment and 

 roll angle with roll frequency for three different nozzles 



768 



