text: ENGINE  FAILURE  ON THE MULTI-ENGINE 
  
  Effecf of weight and altihtde 
  Control requirements 
  Effeti on performance 
  Etrect of turning flight and configuration 
  
  GROUND  EFFECT.,  _, 
  
  Aerodynamic influence of ground effect 
  Ground effect on specific flight conditions 
  
  INTERFERENCE  BETWEEN  AIRPLANES  IN FLIGHT.. 
  
  Effect of lateral, vertical, and IongiNdinal separation 
  Collision possibility 