I 



tension in the towline between the winch and reel. 



The "freeness" of the fairing on the cable was checked 

 at the stern sheave during payout^, with manual alignment of 

 the sections that did not swivel freely. 



DESCRIPTION OF TESTS 



^ 



The winch was specifically tested to determine its 

 capability for englutting the simulated instrument module, 

 in-hauling and paying out the faired cable under operational 

 conditions^ and developing the predicted loading on the 

 faired cable. 



To determine the first item/ a length of 3/4-inch-diameter 

 wire rope^ with an attached 1,000-pound weight, was rigged 

 over the stern sheave and led forward between the winch tracks. 

 The simulated module was then bolted to the cable between the 

 stern sheave and winch. Tests were conducted by causing 

 the winch to in-haul and payout the module several times. 

 These tests were conducted in fair weather with dry equipment. 



The second item was determined by observing the action 

 of the winch during tests of the towed system. These tests 

 were conducted in a sea state between three and four, with 

 almost continuous heavy rainfall. 



To determine the third item, a length of the faired 

 cable was attached to the dynomometer^ which was shackled, 

 in turn, to the stern sheave, and the winch was engaged so 



II. 9 



