text: R=fq 
  
  where 
  
  f = equivalent parasite area, sq. ft. 
  
  f = CDPmi,S 
  
  q= dynamic pressure, psf 
  
  UP 
  295 
  =- 
  
  or 
  
  DpEfg 
  
  In this form, the equivalent parasite area, f, 
  is the product of CDPml” and S and relates an 
  
  89 