text: derived from study of the basic lift equation 
  and the typical wing lift curve. One impor- 
  tant fact to be appreciated is that the airplane 
  shown in figure 1.11 stalls at the same angle 
  of attack regardless of weight, dynamic pres- 
  sure, bank angle, etc. Of course, the stall 
  speed of the aircraft will be affected by weight, 
  bank angle, and other factors since the product 
  of dynamic pressure, wing area, and lift co- 
  efficient must produce the required lift. A 
  rearrangement of the basic lift equation de- 
  fines this relationship. 
  
  L = c&Y 
  
  using q =$  (I’  in knots, TAX) 