Water inside a straw naturally “climbs” on the sides due to surface tension, which, if a drain could be attached, would mean that a tiny amount of energy could, in theory, be harvested over and over. Capillary Action Perpetual Motion Image courtesy of Encyclopædia Britannica 1911Īs a mechanical engineer, this concept seems intriguing. This difference in weight is supposed to make the chain rotate continuously, though I “suspect” the fact that the longer side pulls at different angles will cancel this benefit out in practice. Fast forward to around 1:25 to see an “overbalanced chain” device, that uses a series of pulleys to make one side of a chain longer than the other. This video features a wheel invented in 1150, with test tubes that accomplish a similar function as Villard’s, except using a liquid. Gift the gift of Make: Magazine this holiday season! Subscribe to the premier DIY magazine todayĬommunity access, print, and digital Magazine, and more Share a cool tool or product with the community.įind a special something for the makers in your life. Skill builder, project tutorials, and more Get hands-on with kits, books, and more from the Maker Shed Initiatives for the next generation of makers.
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