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re: excellent approximation
The approximation will indeed be excellent if one uses the correct power on the second term (dang, mis-typed). The correct form is:
f = 0.0079284 + 0.5966*Re^(-0.35703) + 6.3776*Re^(-1.07109)
Profuse apologies. If anyone wishes to have the code for the Newton solver (I chickened out on the analytic derivative and used a finite difference which works just as well) I will be pleased to post it. The original is in QuickBasic, but it is quite short and obvious.
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