Villard 1901
 
Villard-1901
 
FĂ©lix Henri Villard submitted his first patent application on April 22, 1901, and by July he built his helicopter in metal.
A round fan with a diameter of 7.22 meters was driven by an internal combustion engine of 12 hp.
 
The craft weighed 320 kg and could stand on its leg without falling, but only.