text: while a negative (down) gust causes a de- 
  crease in angle of attack. Of course, a change 
  in angle of attack will effect a change in lift 
  and, if some critical combination of high gust 
  intensity and high flight speed is encountered, 
  the change in lift may be large enough to 
  cause structural damage. 
  
  In order to obviate some of the problems 
  of a deficiency of airspeed at takeoff, usual 
  result can be an excess of airspeed at takeoff. 
  The principal effect of an BXCBJS 
  is the greater takeoff distance which results. 
  The general effect is that each 1 percent excess 
  takeoff velocity 
  incurs approximately 2 per- 
  cent additional takeoff distance. Thus, excess 
  speed must be compared with 
  runway required to produce the higher speed. 
  In addition, 
  the aircraft tires may be subject 
  to critical loads when the airplane is at very 
  high rolling speeds and speeds in excess of a 
  basically high 
  takeoff speed may produce 
  damage or failure of the tires. 
  
  takeoff air@pssd 
  
  As with  the conditions of landing, excess 
  
  velocity or deficiency of velocity at takeoff 
  is undesirable. The proper takeoff speeds and 
  angle of attack must be utilized 
  to assure 
  satisfactory takeoff performance. 
  the airplane 