This machine, that will be considered the ancestor associated with contemporary helicopter,appears in a drawing dated approximately 1480 found in theCodex Atlanticus. Leonardo outlines the plan for an “aerial screw”imagining it as a worm screw with a diameter of approximately 5metres, in their motives, it will have “screwed itself” in air takingadvantage of its thickness. Relocated by the muscle tissue energy of four menwalking regarding main platform, it consisted of a wooden structurecovered with starched linen cloth. Since there is no evidence that Leonardoactually built the machine he imagined, it continues to be certainly one of hismany theoretical insights.
