Under the Whyte notation system, a simple form of steam locomotive, with three axles connecting six driving wheels, and no leading wheels or trailing wheels.

Under the Whyte notation system, a steam locomotive that has a pair of leading wheels followed by six driving wheels, with no trailing wheels.

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

Under the Whyte notation system, a Mallet-type locomotive with no leading truck, two sets of six driving wheels, and no trailing truck.

Under the Whyte notation system, a Mallet-type locomotive with two leading wheels on a leading truck, two sets of six driving wheels, and no trailing wheels.

plural of 2-6-0+0-6-2

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 2-6-0 wheel configuration.

plural of 2-6-6-0

plural of 0-6-0

plural of 0-6-6-0