You pedal a bicycle, but what about a plane?

My friend says that there are some planes that you can fly by pedalling. Is that possible?

Man-made materials such as fibreglass make it possible to build very light aircraft whose propellers are turned by pedals. Some people have built such aircraft but the amount of physical effort needed to keep the propellers turning is too exhausting to keep up for long.

In April 1988, a Greek cycling champion named Kanellos Kanellopoulos pedalled a plane from the island of Crete to the island of Santorini – a distance of 120 kilometres. The plane weighed only 32 kilograms.

 

Picture Credit : Google