text: NAVWEPS 00-ROT-80 
  HIGH SPEED AERODYNAMICS 
  
  the extremely 
  local sonic 
  low aspect ratios required to produce high 
  critical Mach number are not too practical. 
  Generally, the advantage of low aspect ratio 
  must be combined with sweepback and high 
  speed airfoil sections. 
  
  flow. Actually, 
  
  The  thin  rectangular wing 
  
  illustrates several important 