text: NAVWEPS 00-BOT-RO 
  BASIC AERODYNAMICS 
  
  fuel. Hence, the gross weight and stall speed 
  of the airplane can vary considerably through- 
  out the flight. The effect of only weight on 
  stall speed can be expressed by a modified form 
  of the stall speed equation where density ratio, 
  c r,,,.,, and wing area are held constant. 
  
  V_i_z- K 
  K 
  v.,- 
  J 
  
  where 
  
  V*,=stall speed corresponding to some 
  
  gross weight, WI 
  
  V@a= stall speed corresponding to a dif- 
  
  ferent gross weight, WP 
  
  As an illustration of this equation, assume 
  that a particular airplane has a stall speed of 
  100 knots at a gross weight of 10,000 lbs. 
  The stall speeds of this Sam: airplane at other 
  gross weights would be: 