text: TAKEOFF AND LANDING PERFORMANCE 
  The majority of pilot caused airplane acci- 
  dents occur during the takeoff and landing 
  phase of 
  the 
  Naval Aviator must be familiar with all the 
  many variables which influence the takeoff and 
  landing performance of an airplane and must 
  strive for exacting, professional techniques of 
  operation during these phases of flight. 
  
  flight. Because of  this  fact, 
  
  From basic physics, the relationship of 
  velocity, acceleration, and distance for uni- 
  formly accelerated motion 
  is defined by the 
  following equation: 
  
  Takeoff and landing performance is a con- 
  dition of accelerated motion, For instance, 
  during takeoff the airplane starts at zero veloc- 
  ity and accelerates to the takeoff velocity to 
  become airborne. During 
  the air- 
  plane touches down at the landing speed and 
  decelerates (or accelerates negatively) to the 
  In fact, the landing 
  zero velocity of the stop. 
  performance could be considered as a takeoff 
  in reverse for purposes of study. 
  In either 
  case, takeoff or landing, 
  the airplane is ac- 
  celerated between zero velocity and the takeoff 
  or landing velocity. The important factors of 
  takeoff or landing performance are: 
  
  s=g 