Acme12,
Kitestrings,
I regret not seeing this sooner, but I was away on vacation.
This is a subject I really enjoyed learning as I was learning it. I hope you guys are having as much fun.
A few resources, though rather technical:
http://wind.nrel.gov/designcodes/papers/http://www.nrel.gov/wind/model_analysis.htmlDepends on how deep you want to go.
When I was in school I did an analysis for a final exam much like this, though that case was for an aircraft propeller thrust.
Later when my interest was piqued for wind turbines I discovered that the work is basically the same.
If you are analyzing it in pieces, or segments along the span of the blade, then I found that about 10 pieces is all you need to get reasonably accurate results. Later when I got my hands on more powerful software I was able to analyse much more refined sections, then do nearly pure integrations, but none of that really helps the fact that the input data is approximate, making the ouput approximate on any case.
Developing the distribution of load along the span as you have shown it, then using trig to turn the lift vector into the normal vector, will give you the result you're looking for. If doing it in piece-wise analysis, then actually you should just use a sum of moments produced by the series of individual loads. But it won't be hard to do it the other way if you prefer.
Watch the relative wind vector, it changes along the span. There is also the problem that it does NOT obey the TSR that you want the turbine to use, and that in the real world there is an "inflow" factor that messes with everything by several degrees. You will find the inflow described in the Lissaman/Walker paper in the link above.
In fact, I recommend you scan through the Lissaman/Walker paper as soon as possible, you seem ready to start taking it in already. Then drill down into the details as you please and as suits the level of detail you really are looking for.
There are other NREL papers that are of value but I don't have the links handy. I want to hit "Post" before going off into internet-land to find them.