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Leonardo Da Vinci draws a screw that would rotate as it flys through the air. The screw was never built. The device was called "The Helical Air Screw.
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The toy can take off and fly on it's own power.
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This is the first aircraft to take off verticaly, but is too hard to control.
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They can only go in vertical directions.
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In his book he illustrates a helicopter like device.
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Later, he moves to the United States and builds a helicopter.
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He makes a special set of controls that allow the helicopter to fly foward,backwards and side to side.
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The trip lasts 7minutes and 40seconds.
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This the highest flight for a helicopter so far.
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This new invention gives the roter craft more lift.
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This is a helicopter like craft with the fuselage of a airplane nd two main roters.
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The pilot can safely control the Helicopter. The flight is tested by Hanna Reitsch.
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The helicopter stays safely balenced during flight.
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