Norfolk & Western Class J No. 611 steam locomotive is back into service for a limited series of passenger excursions this fall.

Your testicles make several million sperm a day. Here’s how long it takes for them to regenerate (or mature), how this affects your fertility, and more.

Over on his YouTube channel [Tom Stanton] shows us how to build a Stirling Engine for a bike. A Stirling Engine is a heat engine, powered by the expansion and contraction of a working fluid (such a… ...

Of the thousands of steam engines that were manufactured, few were designed to provide the raw power these behemoths of engineering used to push and pull.

The question, " What is the horse power of a locomotive ?" is one of a complex character, and in some respects very different in its nature from that of a stationary steam engine.