Energy Harvesting Systems:
Wind Turbine Blade Design:

Two-blade turbines need higher wind speeds to start.VAWTs: Vertical axis, no yaw mechanism, less efficient.Wind Turbine Classification:

By Axis:
HAWTs: Horizontal axis, more common.Blade radius increases captured energy.By Power Capacity:
Classified as small, medium, or large based on power capacity.Blades are lightweight and use lift and drag forces.