coefficient. Notice that the wing must be 
quite close to the ground for a noticeable 
reduction in induced drag. When the wing 
is at a height equal to the span (h/b=l.O), 
the reduction in induced drag is only 1.4 
percent. However, when the wing is at a 
height equal to one-fourth the span (b/b= 
0.25), the reduction in induced drag is 23.5 
379