text: arated. The combined effect of taper and 
  sweep present a considerable problem of tip 
  stall and this is illustrated by the flow pat- 
  terns of figure 3.16. Design for high speed 
  performance may dictate high sweepback, 
  while structural efficiency may demand a 
  highly tapered planform. When such is the 
  case, the wing may require extensive aero- 
  dynamic tailoring to provide a suitable stall 
  pattern and a lift distribution at cruise condi- 
  tion which reduces drag due to lift. Wash- 
  out of the tip, variation of section camber 
  throughout span, flow fences, slats, leading 
  edge extension, etc., are typical devices used 
  to modify the stall pattern and minimize 
  drag due to lift at cruise condition. 
  
  (2) As shown by the lift curve of figure 
  3.15 the use of sweepback will reduce the lift 
  curve slope and the subsonic maximum lift 
  to note this 
  is important 
  coefficient. 
  case is definitely subsonic since sweepback 
  may be used to improve the transonic ma- 
  neuvering capability. Various sweep angles 
  applied to wings of moderate aspect ratio 
  produce these approximate effects on 
  the 
  subsonic lift characteristics: 