Leonardo drew several variants of the wheel in his notebooks. (Leonardo claimed he tried only to prove it couldn’t be done.) Inspired by a device invented by a contemporary Italian polymath named Mariano di Jacopo, known as Taccola (“the jackdaw”), the artist-engineer refined this previous attempt in his own elegant design. In private, however, as Michio Kaku writes in Physics of the Impossible, Leonardo “made ingenious sketches in his notebooks of self-propelling perpetual motion machines, including a centrifugal pump and a chimney jack used to turn a roasting skewer over a fire.” He also drew up plans for a wheel that would theoretically run forever. Surveying the many failed attempts to make a machine that ran forever, he publicly exclaimed, “Oh, ye seekers after perpetual motion, how many vain chimeras have you pursued? Go and take your place with the alchemists.” But it seems, in doing so, he “may have been a dirty, rotten hypocrite,” Ross Pomery jokes at Real Clear Science. It will come as no surprise to learn that Leonardo da Vinci turned his hand to solving the puzzle of perpetual motion. The long list of contenders includes famed 12th-century Indian mathematician Bhāskara II, also-famed 17th-century Irish scientist Robert Boyle, and a certain Italian artist and inventor who needs no introduction. Yet the hundreds of scientists and engineers who have tried have been anything but fools. As Nicholas Barrial writes at Makery, “in order to succeed,” a perpetual motion machine “should be free of friction, run in a vacuum chamber and be totally silent” since “sound equates to energy loss.” Trying to satisfy these conditions in a noisy, entropic physical world may seem like a fool’s errand, akin to turning base metals to gold. In practice, so far at least, the answer has been a perpetual no. Is perpetual motion possible? In theory… I have no idea….
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