Under the Whyte notation system, a Garratt steam locomotive that is articulated in three parts, with a boiler mounted on the centre frame, and two steam engines mounted in opposite directions on separate frames, one on each end of the boiler, and each engine having a 4-8-4 wheel configuration.

plural of 4-8-4+4-8-4

plural of 4-8-0

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 four leading wheels arranged in a leading truck, eight coupled driving wheels and two 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 four trailing wheels in a trailing truck.

plural of 4-8-6

Under the Whyte notation system, a steam locomotive that has four leading wheels on a leading truck followed by four sets of coupled driving wheels, and no trailing wheels.

plural of 4-8-4

plural of 4-8-2