text: leading edge (unshielded) or partway 
  to the 
  leading edge (shielded). Aerodynamic balance 
  can be achieved by the provision of- a hinge 
  line aft of the control surface leading edge. 
  The resulting overhang of surface area ahead 
  of the hinge line will provide a degree of 
  balance depending on the amount of overhang. 
  Another variation of aerodynamic balance is 
  an internal balance surface ahead of the hinge 
  ,the surface. 
  is contained within 
  line which 
  A flexible seal is usually incorporated to in- 
  crease the effectiveness of the balance area. 
  Even the bevelling of the trailing edge..of the 
  control surface is effective also as a balancing 
  technique. The choice of the type of aerody- 
  namic balance will depend on many factors 
  such as required degree of balance, simplicity, 
  drag, etc. 
  
  attack airplanes. A large patrol or transport 
  type airplane would ordinarily show a much 
  higher maneuvering stick force gradient be- 
  cause of the lower limit load factor. 
  
  When the airplane has high static stability, 
  the maneuvering stability will be high and 
  a high stick force gradient will 
  result. A 
  possibility exists that the forward c.g. limit 
  could be set to prevent an excessively high 
  force gradient. As the 
  maneuvering stick 
  c.g. is moved aft, the stick force gradient de- 
  creases with decreasing maneuvering stability 
  and the lower limit of stick force gradient 
  may be reached. 