assumed by Eames is correct, the maximum predicted tension 

 in the system at design speed is about sixty percent of the 

 cable breaking strength^ and it is obvious that either the 

 speed or depth must be reduced to ensure a reasonable life 

 for the system. If, on the other hand, the loading assumed 

 by Whicker is correct;, the depth objective can be attained 

 with no sacrifice in speed. Since Eames' formulation is 

 based on the assvimption that the resistance is due only to 

 viscous drag, some error will attend application of his theory 

 to the present fairing. This fairing has a fineness ratio 

 of four. A substantial portion of the total resistance must, 

 consequently, be attributed to the pressure distribution 

 rather than the viscous drag. Whicker 's formulation accounts 

 for the existence of this pressure component, but the 

 accuracy of his assumptions is unknown. 'Vhe most important 

 aspect in this development program, therefore, was the 

 demonstration of technical feasibility in achieving the 

 depth objective. 



Since full scope of cable was not available for the 

 trials, an attempt was made to compare predicted with 

 experimentally attained values of depth, cable tension, and 

 cable angle, for given scope. Because the test cable was of 

 slightly larger diameter than that selected for the system, 

 and the depressor was found to have a slightly lower 

 downf orce-to-drag ratio than originally predicted, new 

 performance predictions, on the basis of Eames' theory, 

 were made; results are givan in Appendix III. 



30 



