text: The effect of aspect ratio on wing drag char-. 
  acteristics may be appreciated from inspection of 
  figure 1.31. The basic section properties are 
  shown as the drag characteristics of an infinite 
  aspect ratio wing. When a planform of some 
  finite aspect ratio is constructed, the wing drag 
  coefficient is the rtlm of the induced drag coe&- 
  
  c,” 
  cient, C,,=O.318 AR, and the section drag co- 