# Changes

An important relationship to note is that between force and $\theta$. The combined force balance indicates a relationship between force and $sin \theta * cos \theta * cos \theta$.
As a result, the optimal tilt of the blades would provide an angle to the airflow such that $sin \theta * cos \theta * cos \theta$ is a maximum. This value has been presented in the graph below to show how the value changes as $\theta$ is adjusted.