text: rolling friction is of an approximate magnitude 
  of 0.015 to 0.030 for dry, hard runway surface. 
  The application of brakes supplies a torque 
  to the wheel which tends co retard wheel rota- 
  application of 
  tion. However, 
  brakes creates a braking torque but the initial 
  retarding torque is balanced by the increase in 
  friction 
  force which produces a driving or 
  torque. Of course, when the braking 
  rolling 
  torque is equal to the rolling torque, the wheel 
  experiences no acceleration in rotation and the 
  equilibrium of a constant rotational speed is 
  maintained. Thus, the application of brake 
  develops a retarding 
  torque and causes an 
  increase in friction 
  force between the tire and 
  runway surface. A common problem of brak- 
  ing technique is application of excessive brake 
  pressure which creates a braking torque greater 
  than 
  torque. 
  In this case, the wheel loses rotational speed 
  and decelerates until 
  and the result is a locked wheel with 
  surface subject to a full slip condition. 
  
  BRAKING PERFORMANCE 
  
  For the majority of airplane configurations 
  and runways conditions, 
  the airplane brakes 
  furnish the most powerful means of deceler- 
  ation. While specific techniques of braking 
  are required 
  there 
  are various fundamentals which are common 
  to all conditions. 