Power transmission
The Ventomobile was a wind-powered lightweight three-wheeler designed by University of Stuttgart students. It had a carbon-fiber rotor support that was directed into the wind and variably pitched rotor blades that adjust for wind speed. Power transmission between the rotor and the driving wheels was via two bicycle gearboxes and a bicycle chain. It won the first prize at the Racing Aeolus held at Den Helder, Netherlands, in August 2008.