Under the Whyte notation system, a steam locomotive that has six leading wheels arranged in a leading truck, eight coupled driving wheels and six trailing wheels in a trailing truck.

Under the Whyte notation system, a steam locomotive that has four leading wheels arranged in a leading truck, eight coupled driving wheels and six trailing wheels in a trailing truck. The C&O had one planned as their class J4, but it was never built.

Under the Whyte notation system, a steam locomotive that has two leading wheels, eight coupled driving wheels, and six trailing wheels.

plural of 4-8-6

plural of 6-8-6

plural of 2-8-6