text: 215 knots. This point on the drag curve pro- 
  duces the highest proportion between velocity 
  and drag and would be the point for maximum 
  range if the airplane were jet powered. Be- 
  cause of the high proportion of parasite drag 
  at this point the long range jet airplane has 
  great preference for great aerodynamic clean- 
  ness and less demand for a high aspect ratio 
  than the long range propeller powered airplane. 
  (E) At a speed of 400 knots, the induced 
  drag is an extremely small part of the total 
  drag and parasite drag predominates. 
  
  (P) As the airplane reaches very high flight 
  speeds, the drag rises in a very rapid fashion 
  due to compressibility. Since the generalized 
  equation for parasite drag does not account for 
  compressibility effects, the actual drag rise is 
  typified by the dashed line. 
  
  The airplane drag curve shown in figure 1.34 
  is particular to one weight, configuration, and 
  altitude in level flight. Any change in one of 
  these variables will affect the specific drags at 
  specific velocities. 
  
  The airplane drag curve is a major factor in 
  many items of airplane performance. Range, 
  endurance, climb, maneuver, landing, takeoff, 
  etc., performance are based on some relation- 
  ship involving the airplane drag curve. 