Why Do Wind Turbines Have Three Blades?

Two is too few, four is too many, but three is just perfect. Individuals watch a Real Engineering video to see why wind turbines typically have three blades. This requires consideration of both cost and speed of blade rotation.

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Instructional Ideas

  • Take a field trip to a wind turbine farm if possible
Classroom Considerations

  • Scholars should have familiarity with torque
  • Pupils must be able to interpret graphs
Pros

  • Graphics aid with understanding
  • Explanations are descriptive and informative
Cons

  • None