Welcome to a "sneak peek" article from the April edition of the Pneumatics Now from GlobalSpec.
Check out this site: "The Museum of Unworkable Devices. My favorite part is the "Hall of Machinery", where site creator Donald Simanek has animated wheels that beautifully capture the misguided visions of perpetual-motion-machine inventors and other hard-core believers who "refused to be intimidated by the laws of nature." Learn more about the incorrect use of concepts such as overbalance, positive feedback, and reactionless force.
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