Moody friction factor
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The Moody friction factor is a misnomer arising from the use of the Moody chart or Moody diagramme (after L. F. Moody) to plot values of the Darcy friction factor as a function of Reynolds number and relative roughness. The correct term is the Darcy friction factor. The chart that plots all of the Darcy friction factors, which was created by L. F. Moody, is named the Moody chart.
http://img95.imageshack.us/img95/1958/moodydr8.png
L.F. Moody, "Friction factors for pipe flow," Trans. ASME, vol. 66, 1944.
However, the two different friction factors, which differ by a factor of 4, are the Darcy friction factor and the Fanning friction factor. Moody's original publication used the Darcy friction factor, and so this is the more common equivalence used.
