Cable Loading Assumption Eames Eames Eames Whicker 



Resistance Coefficient 0.2 0.2 0.3 0.3 



Cable Angle at Depressor g^o g^o g^o g^o 

 at 7^-knot tow speed 



scope of cable Required to ^ . . g . g . 

 Attain a Depth of 5000 ft ' 



Tension at the Surface 15,000 15,400 26,000 15,000 



lbs lbs lbs lbs 



The results indicate that if Whicker 's loading 

 assumptions are correct, the desired performance can be 

 attained, even with a resistance coefficient as high as 

 0.3, without exceeding the arbitrarily imposed limitation 

 of 15,000 pounds on cable tension. 



Computations for Sea Trials 



It was determined from tow tests that at the higher 

 values of towing speed the depressor imposes an angle of 

 81 degrees on the lower end of the cable. Since this value 

 is slightly less than the 84 degrees predicted in (2), and 

 since an 0. 782-inch-diameter cable was to be used for the 

 sea trials in place of the 0. 75-inch-diameter cable on which 

 previous performance predictions were based, estimates of 

 the cable geometry for these new conditions were required 

 for comparison with sea-trial data. These computations 

 were made on the basis of Eames' formulation, using a resis- 

 tance coefficient of 0.3; the results are shown in Figures 

 III-2 and III-3. 



III. 5 



