text: items of climb 
  performance is the maximum rate of climb. 
  By the previous equation for rate of climb, 
  maximum rate of climb would occur where 
  there exists the greatest difference between 
  power available and power 
  i.e., 
  maximum (Pa- Pr). Figure 2.21 illustrates 
  the climb rate performance with 
  the curves of 
  power available and power required versus 
  velocity. The power required curve is again a 
  representative airplane which could be powered 
  by either a turbojet or propeller type power- 
  plant. The power available curves included 
  are for a characteristic propeller powerplant 
  and jet powerplant operating at maximum 
  output. 
  
  One of the most important 
  
  required, 
  
  The power curves for the representative pro- 
  peller aircraft show a variation of propulsive 
  power typical of a reciprocating engine-pro- 
  peller combination. The maximum rate of 
  climb for this aircraft will occur at some speed 
  
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