Question: Wind Turbine Vibrations from Model Gallery

Hi, I am a student and a recent new MapleSim user. I downloaded the MapleSim Wind Turbine Vibrations model from the Model Gallery (http://www.maplesoft.com/products/maplesim/modelgallery/detail.aspx?id=162). 

I do not understand the model diagram, and find it difficult to visualize the way all the components work. Also, how can I change the mass moment of inertia of each blade? 

This is my first question, apologies if it sounds silly. Thank you :)

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