Hydrofoil Motions in a Random Seaway 



PEAK TO PEAK 

 AT C.G. 



PEAK TO PEAK 

 AT C.G. 



HEAVE 



AMPLITUDE 



PEAK TO PEAK 



(FEET) 



HEAVE 



AMPLITUDE 



PEAK TO PEAK 



(FEET) 



PITCH 



AMPLITUDE 



PEAK TO PEAK 



(DEGREES) 



PITCH 

 AMPLITUDE 



2 FT FOLLOWING SEAS 

 RESPONSE TO VARIOUS C|_ 

 DELAY FUNCTIONS AND TO 

 a TYPE VIRTUAL INERTIA 



2.0 



100 

 WAVE LENGTH 



Fig. 18 - RX craft — longitudinal heave /pitch only 



669 



