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It is a real attack on Newton's gravity. Without the rotation of the blades it would fall like a stone, without gliding. But who understood the concept? The idea is contained in Leonardo Da Vinci's rotating screw found in the Atlantic Codex, but it took 500 years to create it. Also thanks to the prototype built by our invisible genius Enrico Forlanini: a "helicopter" with two counter-rotating propellers powered by a steam engine that took flight in Milan in 1877, considered the first motorized vehicle heavier than air to take flight. Today you can admire Forlanini's original at the Museum of Science and Technology in Milan as director Fiorenzo Galli tells me in the podcast. While modern helicopters are increasingly designed thanks to super computers. So Carlo Cavazzoni, of Leonardo, takes us into the future of flight technology. As Albert Einstein said, everyone knows that something cannot be done until a naive person comes along who doesn't know it and does it. «Invisible Geniuses» is the podcast of Corriere della Sera that tells the stories of the inventors, innovators and great Italian scientists who have changed our lives. Hosted by Massimo Sideri, correspondent and science and technology columnist for Corriere. Listen to all the episodes here: • Invisible Geniuses Subscribe to the channel to not miss the next updates: / @corrieredellasera