Why Most Wind Turbines Are 3-Bladed

Although wind turbines can have any number of blades, most that we see have three. The reasons for that are many, as explained in this Minute Physics video. In terms of physics, wind turbines with more blades produce more torque, but they pay for it with more drag. Engineering-wise, wind turbines with odd numbers of blades have less uneven forces on them, and, thus, cost less. And, finally, people just prefer the look and sound of 3-bladed wind turbines over other forms! (Video and image credit: Minute Physics)