The dynamics of rotating 2 blades Vs 3 Blades has been known since before WWII. It can be explained. I doubt it can be explained to those ignorant of apparent wind, angle of attack, stall, lift, negative lift, centripetal force and furling in less than a small book. Some reading this, perhaps most, will be ignorant in one or more of those fields. But, by WWII, manufacturers of airplanes figured out 2 blade propped large planes would tear up stuff and placing a 3 blade prop on would cure some of those problems.

There have been many attempts to build Variable Pitch wind turbines. Some time back "Dinges' and I put together all of the VP patents we could find in one repository:

http://www.anotherpower.com/gallery/Variable-Pitch

Jacobs, the accepted master of the art, admitted having problems with larger sizes in his later patents. If one were attempting to build a new VP system, they would be well served to study what is in the patents.