DESIGN DISCUSSION 



GENERAL 



As illustrated on Figure 2, the towed-systera design 

 resulting from the development and tests to date consists 

 of 8,000 feet of cable covered with a freely-swiveling 

 rubber fairing and additional unfaired cable to permit 

 rigging. The instrument modules are placed "in-line" and 

 serve as electrical and structural links between the seg- 

 ments of cable. The depressor is attached to the bottan- 

 raost module. In the discussion of the components that 

 follows J the relevant SED Assembly Drawing number for each 

 component is listed to the right of each heading. 



DEPRESSOR SED Drawing No. 50068 



The depressor, shown on Figure 3, has circular-arc- 

 airfoil wing sections and flat-plate stabilizers. The 

 structural members are fabricated of plate and bar stock, 

 the edges of which are simply rounded where streamlining is 

 reguiredo 



The structure consists of welded subassemblies bolted 

 together to facilitate proper alignment. The two ballasting 

 weights are cast in halves which are bolted together? each 

 weight is then bolted to the forepart of the structure o If 

 desired, the xinit ccui be disassembled to facilitate shipping 

 and storage c^ All nuts, bolts ^ and movable hardware ai^e made 

 of stainless steel. 



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