text: angle of attack indicator allows precision con- 
  trol of the airspeed. The accomplished insttu- 
  flying 
  ment pilot is the devotee of “attitude” 
  technique-his 
  plus 
  creed being 
  power equals performance.” During a GCA 
  approach, the professional instrument pilot 
  controls airspeed with stick (angle of attack) 
  and rate of descent with power adjustment. 
  
  “attitude 
  
  20.00 
  15.P 
  12.7’ 
  8.20 
  4.6’ 
  2.10 
  1.10 
  .T= 
  .5O 
  
  transient 
  tend to complicate the 
  conditions of flight 
  relationship of angle of attack and airspeed. 
  However, the majority of flight and, certainly, 
  the most critical regime of flight (takeoff, ap- 
  proach, and landing), 
  is conducted in essen- 
  tially steady flight condition. 
  
  Maneuvering flight and certain 
  
  Note that for the conditions of steady flight, 
  each airspeed requites a specific angle of attack 
  and lift coefficient. This fact provides a fun- 
  damental concept of flying technique: Angle 
  of attack is tbs primary Control of airspeed in steady 
  flight. Of course, the control stick or wheel 
  allows the pilot to control the angle of attack 
  and, thus, control the airspeed in steady flight. 
  In the same sense, the throttle controls the 
  output of the powerplant and allows the pilot 
  to control rate of climb and descent at various 
  airspeeds. 