This machine, which is considered the ancestor connected with modern helicopter,appears in a drawing dated around 1480 current theCodex Atlanticus. Leonardo describes the master plan for an “aerial screw”imagining it as a worm screw with a diameter of around 5metres, in their motives, it will have “screwed it self” in environment takingadvantage of its thickness. Relocated by the muscle tissue power of four menwalking regarding primary platform, it contains a wooden structurecovered with starched linen material. While there is no evidence that Leonardoactually built the equipment he imagined, it stays one of hismany theoretical insights.