MAKE’s photo editor, Sam Murphy, sent us a link to this 1930s Chevrolet educational video which describes how a differential gear works. Skip ahead to 1:50, if you don’t want to see the rest of the video (which is highly entertaining throughout).

How Differential Gear works [Thanks, Sam!]

Gareth Branwyn

Gareth Branwyn is a freelancer writer and the former Editorial Director of Maker Media. He is the author or editor of a dozen books on technology, DIY, and geek culture, including the first book about the web (Mosaic Quick Tour) and the Absolute Beginner’s Guide to Building Robots. He is currently working on a best-of collection of his writing, called Borg Like Me.

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