On an international scale, two of arguably the most famous steam locomotives in the world are part of the 4-6-2 family ... the introduction of the 4-6-4s, 4-8-2s, and 4-8-4s.

There are steam locomotives, and then there’s “Big Boy.” At 604 tons and 132 feet long and with a 4-8-8-4-wheel arrangement, it is the largest, most powerful steam locomotive in the world.