t; 6 



as Z 



o o o o o 



Tangential 



Drag 

 Coefficient 



Unknown. 



Probably quite 

 high. 



Same as above. 

 Unknown. 



Unknown. 



c 

 £ 2 d 



^ a 



— — — j: j: 

 D 3 



O JO 



.-. -. « ^ o X 

 XX X «: =0 -g, 



c 



i 



a. 



Same as above. 

 Same as above. 



Same as above 



Optimum vibration suppression for 

 least ribbon. 



Vibration amplitude reduced by more 



than 50%. 



c 



o 



V -a 



3 .S- 



" S 

 Q 



Rough braid over stranded cable; 

 OD = 11/32 inch. 



Same as above but with 1/16 

 inch by 3-inch hairs spaced at 

 approximately 6 per inch. 



Same as above except two sets 

 of hairs spaced at approximately 

 6 per inch. 



0.01 5-inch-thick polyurethane 

 film, 2 cable diameters wide, 6 

 diameters long, spaced at 1 to 3 

 diameters apart. 



1/4-inch cable wrapped around 

 1-inch tow cable with a pitch of 

 approximately 10 inches. 

 Direction of wrap reversed every 

 10 feet. 



a. 



Lz. 



Braided covering 



Braided covering with 

 haired fairing 



Double haired fairing 

 Ribbon fairing 



Helical strake 



33 



