Figure 5 — Body Plan, Destroyer Model 5 



TEST RESULTS 



Pitch and heave parameters for each model in regular waves representing head seas 

 conditions are plotted in Figures 6 through 9 to a base of "tuning factors," The following 

 definitions are used: 



Pitch parameter, — 



^m Pitch amplitude 



Heave parameter, 



6 Max. surface wave slope 



7 



"m Heave amplitude 



Wave amplitude 



Tuning factor, A = 



Froude number, 



Natural period 



F = 



Period of wave encounter 

 V 



^ffi^ 



The dimensionless parameters are plotted at constant Froude numbers to facilitate comparisons 

 among the various models. 



