If Blasius or Darcy friction factor is ‘f1’ then the Fanning friction factor is equal to____________________? August 27, 2021March 10, 2019 by admin If Blasius or Darcy friction factor is ‘f1’ then the Fanning friction factor is equal to____________________? A. f1/4 B. 4f2 C. 2f1 D. f1/2