Which famous scientist sketched the drawings that are credited as a model for the modern-day helicopter?

Leonardo da Vinci

Though the first actual helicopter wasnt built until the 1940s, it is believed that Leonardo da Vincis sketches from the late fifteenth century were the predecessor to the modern day flying machine. As with many of da Vincis ideas, he never actually built and tested it but his notes and drawings mapped out exactly how the device would operate. Da Vinci scrawled next to his sketches of the screw-like machine the following description: If this instrument made with a screw be well made that is to say, made of linen of which the pores are stopped up with starch and be turned swiftly, the said screw will make its spiral in the air and it will rise high. Though the first actual helicopter wasnt built until the 1940s, it is believed that Leonardo da Vincis sketches from the late fifteenth century were the predecessor to the modern day flying machine. As with many of da Vincis ideas, he never actually built and tested it but his notes and drawings mapped out exactly how the device would operate. Da Vinci scrawled next to his sketches of the screw-like machine the following description: If this instrument made with a screw be well made that is to say, made of linen of which the pores are stopped up with starch and be turned swiftly, the said screw will make its spiral in the air and it will rise high. (Source: InventHelp, www.da-vinci-inventions.com)