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Leonardo da Vinci's Screw
Leonardo drew sketches of a water lifting device and possibly seeing the effects of the screw in moving fluids and knowing that air acts as a light fluid, he presented what may we see as a precursor of helicopters. -
The Feather Model
Frenchmen, Launoy and Bienvenu constructed a model of a helicopter with feathers, this would then be used -
First Helicopter Flight
Igor Sikorsky, inspired by inspired mechanical drawings by Leonardo da Vinci, pioneered the invention development of helicopters. His first two prototypes failed to fly, but with him at the control, the VS-300 successfully lifted off the ground.