Gears and Mechanical AdvantageThere are three things that really set mankind apart from the remainder of the animal kingdom: 1) opposable thumbs, 2) the collected works of William Shatner, and 3) t...

Four-Bar LinkagesRotational motion is ubiquitous in modern machine design—a lot of which boils down to the fact that electric motors rotate, and don't translate. But what if you're designing a ma...

Flywheels and Energy StorageNine out of ten dentists agree that the wheel was a pretty great invention. But modern scientists and engineers aren't just content to let a millennia-old technology lik...