The goal of this project is to develop a variable pitch wind turbine that can be built using 3D printed parts as well as easy to purchase components, assembled using hand tools, that can drive a brushless DC motor as a generator. The result wave form can be rectified into DC power.
One of the issues that can affect fixed pitch wind turbines is high winds causing the turbine to spin at excessive speeds which can result in bearing failure or the generator getting too hot and damaging itself.
A variable pitch wind turbine can feather its blades during high speed winds mitigating this, as well as optimise the angle of attack to maximise energy harvesting across a range of wind speeds.
So far I've determined the average wind speed of the deployment location from online sources, and added some research documents on turbine airfoil selection from the National Renewable Energy Laboratory.
At this time I will likely use either the NACA 2412 or 4412 airfoils, or one of the NREL S-series airfoils.