Unique locomotives

British-built railroad steam locomotive

class of one Soviet 4-14-4 locomotive

class of 1 American four-cylinder duplex 6-4-4-6 locomotive

The Impulsoria was a locomotive constructed in 1850 that was powered via a gearbox by one-two to four horses on a treadmill following a design by Clemente Masserano. It undertook trials in London in 1850 and was exhibited at The Great Exhibition in 1851.

prototype British gas turbine locomotive

one-off three-cylinder 4-6-2 locomotive

steam-powered railroad locomotive

class of 1 prototype electric locomotive

prototype British gas-turbine locomotive