text: forces in a conventional air- 
  plane are made up of two components. First, 
  the basic stick-free stability of the airplane 
  is 
  contributes an incremem of force which 
  independent of airspeed.. Next, 
  there. is an 
  increment of force dependent on the trim tab 
  setting which varies with-the dynamic pres- 
  the square of ‘equivalent airspeed. 
  sure or 
  Figure 4.14(B) 
  the variation of 
  indicates 
  stick force with airspeed and illustrates the 
  In order 
  effect of tab setting on stick force. 
  te trim 
  the airplane at point (1) a certain 
  amount of up elevator is required and zero 
  stick force is obtained~ with’the nse of the tab. 
  To trim the airplane for higher speeds corre- 
  sponding to points (2) and (3) less and less 
  nose-up tab is required. Note that when the 
  airplane is properly trimmed, a push force is 
  required to increase airspeed and a pull force 
  is required to decrease airspeed. In this man- 
  ner, the airplane would indicate positive stick 
  for air- 
  force stability with a stable “feel” 
  
  There may be slight differences in the static 
  the elevators are 
  if 
  the elevators are 
  flight, 
  
  stability 
  longitudinal 
  float free. 
  to 
  allowed 
  allowed to float free as in “hands-off” 
  the elevators may have a tendency to “float” 
  or streamline when the horizontal tail is given 
  a change in angle of attack. 
  
  If 
  
  If the hot&ma1 