To get the optimal wingloading for our cruise at M0.85, we use the following simplified equation:
The dynamic pressure,
This indicates that the optimum wingloadling for our cruise mission
leg is
is here (M0.85@40000ft) 
, aspect ratio, 
,
is 
and to get 
, we use ``equivalent skin friction'' times
the 
ratio, which gives the figure 
.
.