text: NAVWEPS OO-ROT-80 
  AIRPLANE PERFORMANCE 
  
  normal force and increased braking friction 
  force to cope with the increased mass. Also, 
  the higher landing speed at the same CL and 
  CD produce an average drag which increased in 
  the same proportion as the increased weight. 
  Thus, increased gross weight causes like in- 
  creases in the sum of drag plus braking friction 
  and the acceleration is essentially unaffected. 
  
  To evaluate the effect of gross weight on 
  relationships 
  
  landing distance, the following 
  are used: 
  
  the effect of weight on landing velocity is 