very small compared to the down force, Lo: This 
assumption considerably reduces the effort in 
making cable calculations since the tables of 
functions, such as Reference 1, are usually set up 
with 9 = 90° as a reference point. Furthermore, 
it is usually feasible to achieve a value of at 
least 9 or 10 for = using either weight or a 
o) 
combination of weight and a depressing wing to 
produce the down force, 
In carrying out calculations of the cable configuration, 
the cable characteristics, defined in Figure l1, are generally 
expressed in non-dimensional form in the following manner: 
1 
= eS (6) 
oF Sag (7) 
Rs ‘ 
o = To (8) 
We will now consider the use of these functions, which 
have been tabulated for a range of variables, in calculating 
the configuration of a system using bare cable, 
12 
