text: NAVWEPS DO-80T-80 
  STABILITY AND CONTROL 
  
  Adequate pitch and lateral control effective- 
  ness are easy to obtain in the typical helicopter 
  and usually present no problems. The more 
  usual problem is an excess of control effective- 
  ness which results in an overly sensitive heli- 
  copter. The helicopter control specifications 
  attempt to assure satisfactory control charac- 
  teristics by requiring adequate margins of con- 
  trol travel and effectiveness without objection- 
  able sensitivity. 
  
  Directional control 