The Physics of Windmill Design

This video was created in partnership with Bill Gates, inspired by his new book “How to Avoid a Climate Disaster.” Find out more here: This video is about how physics dictates the design of modern windmills - why they are so big, have so few blades, and have such skinny blades. REFERENCES H. Glauert: Aerodynamic Theory, 1935 Division L (Airplane Propellers), Chapter XI: Windmills and Fans Wind power extraction fundamentals Betz’s Law ’s_law Tip Speed Ratio Aerodynamics of Wind Turbines Book Penn State Wind Turbine Aerodynamics Lesson Wind Power Physics youtube video Why do Wind Turbines Have Three Blades?