Now retired from a career engineering, Duc Thang Nguyen has taken on a new hobby: modeling how gears work ... together a handy guide to all of his animations. Here are a few great ones, but ...

A hands-on demonstration explains how levers function through balancing weights on a fulcrum and how interlocking gears are essentially a system of spinning levers. Stop-motion animation shows the ...

The new video, “How Does a Draft Gear Absorb Railcar Energy?” provides a look at draft gear design, and uses computer animation to demonstrate how draft gears protect a railcar and its content during ...