iWindTurbine is available from iTunes for $0.99 and enables users to build their own horizontal axis wind turbine and learn about the variables that influence power output. Students can manipulate any/all of the following variables for their turbine: rotor diameter, air density, wind speed, aerodynamic efficiency (power coefficient) and electro-mechanical efficiency and then iWindTurbine calculates the power output. In addition, by entering average annual electricity consumption of a house, students will find out how many houses can be powered with their design!
Don’t have the app? I also came across this online Wind Turbine Power Estimator which was created by the developer of iWindTurbine.
If you use either of these tools in your wind energy instruction, I’d love to hear from you.