@amiramiri
The Paul Cornu Helicopter, built in 1907 by French engineer Paul Cornu, is recognized as the first vertical take-off and landing (VTOL) aircraft to achieve a controlled, piloted flight. Though tethered and not capable of free flight, the machine hovered for about 20 seconds at a height of 1.5 meters, marking a milestone in aviation history. The Cornu system was based on a tandem rotor concept and represented a bold attempt to overcome the aerodynamic challenges of the pre-World War I era. Below is a technical examination of its key
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