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William Gurstelle

William Gurstelle

William Gurstelle is a contributing editor of Make: magazine. His new book, Defending Your Castle: Build Catapults, Crossbows, Moats and More is now available.

Latest from William Gurstelle

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While looking for a way to strengthen cannon barrels, Bessemer discovered better ways of making steel. Read more »

steal rubber band shooter featured image

Learn how to heat-treat and toughen the metal that built our world: carbon steel. Read more »

double-sphere-diagram

Louis Poinsot was the first to demonstrate that any number of individual forces pushing or pulling on a rigid thing can be simplified into just a single linear force and a twisting force called a couple. Build this fun set of DIY "hurricane balls" to demonstrate the physical processes at... Read more »

RemakingHistory

Re-create the incendiary reaction that welded the world’s modern railways. Read more »

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Build the simple span that launched the great age of iron bridge building. Read more »

Airic robot aarm developed by Festo AG uses air muscles controlled by tiny piezo proportional valves, 2007. —Credit: Festo AG & Co. KG

A father’s love inspired this A-bomb maker to invent a pneumatic actuator that’s used in robots today. Read more »

RemakingHistory-Rubber-1-co

Re-create the process that gave us car tires, rubber bands, and the boots on your feet Read more »