text: NAVWEPS DD-8OT-80 
  APPLICATION OF AERODYNAMICS 
  TO SPECIFIC PROBLEMS OF FLYING 
  
  later portions of takeoff if the airplane is un- 
  able to become airborne or if insufficient margin 
  above stall speed prevents successful initial 
  climb, 
  In no circumstances should a formation 
  of ice or frost be allowed to remain on the air- 
  plane wing surfaces prior to takeoff. 
  
  ENGINE FAILURE ON THE MULTIENGINE 
  
  AIRPLANE 