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→Angle of blade and the resulting forces to spin the blades versus surface area exposed
As a result, the optimal tilt of the blades would provide an angle to the airflow such that <math>sin \theta * cos \theta * cos \theta</math> is a maximum. This value has been presented in the graph below to show how the value changes as <math>\theta </math> is adjusted.
= '''-- Regional Considerations --''' =