text: solving for V, 
  
  - 
  & 
  J L,J 
  V=17.2 
  
  Since the stall speed is the minimum flying 
  the lift co- 
  speed necessary to sustain flight, 
  efficient must be the maximum (CL,,,,). 
  
  Suppose that the airplane shown in’ figure 
  
  1.11 has the following properties: 
  Weight = 14,250 lbs 
  
  Wing area=280 sq. ft. 
  
  C &=1.5 
  
  If the airplane is flown in steady, level flight at 
  sea level with 
  the stall 
  speed would be: 
  
  ,- 
  V.= 17.24&$ 
  
  where 
  V.= stall speed, knots TAS 
  
  W= weight, lbs. (lift = weight) 
  
  va= 17.2 J (I.&4E;280) 
  
  = 100 knots 