A rotor of 12 cm diameter is attached to a precision electric motor, used as a generator, to make a model wind turbine. Output power of the generator is measured in a wind tunnel with up to 15 m s(-1) air velocity. The maximum power is 3.4 W, the power conversion factor from kinetic to electric energy is c(p) = 0.15. The v(3) power law is confirmed. The model illustrates several technically important features of industrial wind turbines quantitatively.