text: In addition to the yaw due to rolling motion 
  there will be a yawing moment contribution 
  due to control surface deflection. Conventional 
  ailerons usually contribute an adverse yaw 
  while spoilers may contribute a favorable or 
  “proverse” 
  yaw. The high wing airplane 
  with a large vertical tail may encounter an 
  influence from inboard ailerons. Such a con- 
  figuration may induce flow directions at the 
  vertical tail to cause proverse yaw. 
  
  Since adverse yaw will be greatest at high 
  C, and full deflection of the ailerons, coordi- 
  nating steep turns at low speed may produce 
  a critical requirement for rudder control power. 
  In the majority of air- 
  planes, the rudder is the principal control for 
  spin recovery. Powerful control of sideslip at 
  
  SPIN RECOVERY. 