Researchers, historians, engineers, friends, and relatives describe the ups and downs of Corradino D'Ascanio, the man who invented the helicopter, the variable pitch propeller, and the most famous scooter in the world: the Vespa.
Researchers, historians, engineers, friends, and relatives describe the ups and downs of Corradino D'Ascanio, the man who invented the helicopter, the variable pitch propeller, and the most famous scooter in the world: the Vespa.
