_7- 



TEST RESULTS AND ANALYSIS OP DATA 



The variation of resistance with initial displacement, 

 initial trim, position of towpoint, and speed, as determined in 

 Part 1 of the program, is shown in Figures 1 to 5„ Still pictures 

 showing the corresponding running attitudes and spray formations 

 at a full-scale speed of approximately 35 knots, are included in 

 Figures 7 to 15» Figure 6 is a comparative plot of the resis- 

 tances of the five models as derived from Figures 1 to 5, at 

 the best trim for each model, that is, the trim for minimum 

 resistance o 



The results of the simulated cable load tests, Part 



2 of the program, are shown in Figures 16 to 20 at speeds cor- 

 responding to 10, 20, and 35 knots full scale „ The initial 

 points on the curves, indicated by circles, are the resistances 

 at zero cable load» It should be stated that the initial trims 

 noted correspond to the zero load condition, and were not reset 

 when the simulated cable loads were applied,, The curves shown 

 are for the extreme towpoint positions, the intermediate tow- 

 point positions being designated by symbols „ 



The maneuvering characteristics of the models, Part 



3 of the program, are best illustrated by the motion pictures 

 taken during the tests „ 



The results of the estimated full-scale drag of the 

 targets including simulated cable load, and the estimated full- 

 scale cable tensions, Part 4 of the program, are presented in 



