it was neceasary to asstirae that the tangential component of 



the hydrodynamic load was sustained solely by the fairing and 



* 

 that the cable was towed at the critical angle and at 



design speed. Based on Eamea' and Whicker 's loading func- 

 tions, estimates of 2.55 lb/ft and 0.67 lb/ft, respectively, 

 were determined for the tangential loading. Both estimates 

 are conservative since the cable must sustain some part of 

 the tangential component of the hydrodynamic drag. Also^, the 

 angle an element of fairing makes with the horizontal is not 

 constant, but increases from the critical angle of approxi- 

 mately 24 degrees at the upper end, to approximately 84 degrees 

 at the depressor end of the catenary. 



Whicker 's loading functions, v^ich are the more real- 

 istic of the two formulations, were used in determining the 

 length of fairing between cable stops. Eames' loading func- 

 tions were used to estimate the load that the cable stops 

 and hangers must sustain. The use of the very conservative 

 load estimate in the design of the cable stops and hangers 

 provides a safety factor in the design. 



■ff 



The critical angle is the acute angle subtended by a long 



towline and the horizon, when the towline is towed from 



the upper end along a path parallel to the water's surface 



with no load attached to the lower end. 



1. 10 



