text: V7.=17.2  c w 
  J-- 
  .ln2s 
  
  where 
  
  V.-stall 
  W=gross weight, lbs. 
  
  speed, knots TAS 
  
  c Lnoz= airplane maximum lift coefficient 
  
  csaltitude density ratio 
  S= wing area, sq. ft. 
  
  the effect on stall 
  This equation illustrates 
  speed of weight and wing area (or wing load- 
  ing, W/S), maximum lift coefficient, and alti- 
  If the stall speed is desired in EAS, the 
  tude. 
  density ratio will be that for sea level (u= 
  1.000). 
  
  EFFECT OF WEIGHT. Modern configu- 
  rations of airplanes are characterized by a large 
  percent. of the maximum gross weight being 