Leonardo's great machines

During the XXIII Gathering of Engineers the young Leo who comes from Vinci and is said to be a great-great-great grandson of the brilliant Leonardo finds himself involved in a lively discussion about his illustrious ancestor: a colleague claims that Leonardo is a genius overrated and he promises to change his mind. Thus begins a challenge of inventions: submarines, airplanes, cars, tanks but also fans, screws, cranes and calculators... 40 machines designed by Leonardo da Vinci more than five hundred years ago which are still relevant and very useful today!