However, the two gears can vary in size to achieve a different gear ratio. An example of this is in a hand drill, where the drive gear is larger than the driven gear. A pillar drill with a rack ...

An obscure but classic motion picture about logging in the Northwest, and the unique log-hauling locomotive that starred in ...

Manufactured in 1855, The Fairy Queen has been active on and off ever since. The locomotive typically ran between Howrah and Raniganj in India. After many decades on display and in museums ...

If you're working on a steam locomotive, avoid disassembling the running gear as much as possible, especially on plastic ...