Definition of the noun 4-4-4
What does 4-4-4 mean as a name of something?
- Under the Whyte notation system, a steam locomotive that has four leading wheels arranged in a leading truck, four coupled driving wheels and four trailing wheels in a trailing truck.
4-4-4: Under the Whyte notation for the classification of steam locomotives, 4-4-4 represents the wheel arrangement of four leading wheels on two axles, four powered and coupled driving wheels on two axles, and four trailing wheels on two axles. In the United States, this arrangement was named the Reading type, since the Philadelphia and Reading Railroad was the first to use it. In Canada, this type was known as the Jubilee.