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Gears That Did Calculus: Mechanical Computers
Before electronics, gears and cams were doing calculus. This episode traces mechanical computing from the Antikythera mechanism — a shoebox of bronze gears that predicted eclipses — through Vannevar Bush's room-filling differential analyzers and the three-thousand-pound Ford Mark One that aimed battleship guns into the 1990s. Along the way: how a gear ratio becomes an equation, why the moon forced ancient engineers into epicyclic gearing, what a spinning disc integrator actually computes, and the surprising ways analog computing is still alive today doing things digital machines can't. Key…
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