The need to measure mechanical power is older than the car itself. Back in the 18th century, mine owners measured how hard a horse could pull. During the Industrial Revolution, engineers expanded on ...

Starting engine dynamometer pulls at low rpm is hard on the dyno and hard on the engine. Today, engine dynamometer testing is an integral part of many HOT ROD engine buildups and product tests.

A fully loaded 18-wheeler can now roll at highway speed without leaving a building outside Chicago. Argonne National ...