Under the Whyte notation system, a steam locomotive that has an unpowered three-axle leading truck followed by a single powered driving axle.

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

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

(rail transport) Under the Whyte notation system, a steam locomotive that has four coupled leading wheels, six coupled driving wheels, and a pair of trailing wheels. Also known in UK English as a "Pacific" locomotive.

plural of 6-2-0

Under the Whyte notation system, a Mallet-type locomotive with two leading wheels on a leading truck, two sets of six driving wheels, and two trailing wheels on a trailing truck.

Under the Whyte notation system, a Mallet-type locomotive with four leading wheels on a leading truck, two sets of six driving wheels, and two trailing wheels on a trailing truck.

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.

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 2-6-4 wheel configuration.

plural of 4-6-2+2-6-4