Under the
Whyte notation for the classification of
steam locomotives by
wheel arrangement, the 2-4-2+2-4-2 is a
Garratt locomotive. The wheel arrangement is effectively two
2-4-2 locomotives operating back to back, with the
boiler and
cab suspended between the two power units. Each power unit has a single pair of
leading wheels in a leading truck, followed by two coupled pairs of
driving wheels, with a single pair of trailing wheels in a trailing truck.
Overview
This was the rarest of all Garratt types, with only one class of four locomotives constructed to this wheel arrangement.[1] It most likely evolved from the
2-4-0+0-4-2 Double Porter Garratt, with the trailing wheels added on each engine unit to improve stability at speed.
2-4-2+2-4-2 Garratt production list – All manufacturers[1]
All four 2-4-2+2-4-2 locomotives were built in 1943 by
Beyer, Peacock and Company for the 1,000 mm (3 ft 3+3⁄8 in) metre gauge Leopoldina Railway in
Brazil. The locomotives were allocated engine numbers in the range from 400 to 403 on that system.[1]
Under the
Whyte notation for the classification of
steam locomotives by
wheel arrangement, the 2-4-2+2-4-2 is a
Garratt locomotive. The wheel arrangement is effectively two
2-4-2 locomotives operating back to back, with the
boiler and
cab suspended between the two power units. Each power unit has a single pair of
leading wheels in a leading truck, followed by two coupled pairs of
driving wheels, with a single pair of trailing wheels in a trailing truck.
Overview
This was the rarest of all Garratt types, with only one class of four locomotives constructed to this wheel arrangement.[1] It most likely evolved from the
2-4-0+0-4-2 Double Porter Garratt, with the trailing wheels added on each engine unit to improve stability at speed.
2-4-2+2-4-2 Garratt production list – All manufacturers[1]
All four 2-4-2+2-4-2 locomotives were built in 1943 by
Beyer, Peacock and Company for the 1,000 mm (3 ft 3+3⁄8 in) metre gauge Leopoldina Railway in
Brazil. The locomotives were allocated engine numbers in the range from 400 to 403 on that system.[1]