Mart,
The following graph was begged, borrowed, stolen from an article by Prouty in the Winter 2004 issue of AHS's Vertiflite.
It plots the Ideal distribution and the distribution from his example helicopter (single rotor) at 210 knots. There are three observations of interest, IMO.
~ 1/ The outer elements of the rotor blade contribute the largest portion of lift. The somewhat "elliptical lift pressure distribution at cruise" from a rotor is due to the summing of the lift from the front and the back halves of the rotor disk.
~ 2/ The helicopter's distribution of circulation would be closer to the ideal, if the rotor wake was from two counterrotating main rotors.
` 3/ The helicopter's distribution of circulation would be even closer to the ideal, if the craft had Reverse Velocity Utilization. This is because there will be less of a dip in the plot at -0.2 of span.
Dave