Sudan Railways 250 class

The Sudan Railways 250 class was a class of ten 4-6-4+4-6-4 Garratt locomotives. It was one of only two classes of "Double Baltic" Garratts. – the other class being the Rhodesia Railways 15th class.

Sudan Railways 250
Rhodesia Railways 17th class
Type and origin
Power typeSteam
BuilderBeyer, Peacock & Company
Order number1186, 1193
Serial number6798–6801, 6870–6875
Build date1936–1937
Total produced10
Specifications
Configuration:
​
 • Whyte4-6-4+4-6-4
 • UIC2′C2′+2′C2′ h4
Gauge3 ft 6 in (1,067 mm) Cape gauge
Driver dia.57 in (1,448 mm)
Length89 ft 11 in (27.41 m)
Axle load12 long tons 10 cwt (28,000 lb or 12.7 t)
Adhesive weight75 long tons 12 cwt (169,300 lb or 76.8 t)
Loco weight168 long tons 16 cwt (378,100 lb or 171.5 t)
Firebox:
 • Firegrate area		43 sq ft (4 m2)
Boiler pressure200 psi (1.38 MPa)
Heating surface:
 • Tubes and flues		1,776 sq ft (165 m2)
 • Firebox190 sq ft (17.7 m2)
Superheater:
​
 • Heating area440.2 sq ft (40.9 m2)
CylindersFour
Cylinder size16.75 in × 26 in (425 mm × 660 mm)
Train brakesVacuum
Performance figures
Tractive effort43,510 lbf (193.5 kN)
Career
OperatorsSudan Railways
Rhodesia Railways
Caminhos de Ferro de Moçambique
ClassSR: 250
RR: 17th
CFM:
NumbersSR: 250–259
RR: 271–280
CFM: 921–930
DispositionAll scrapped

The ten locomotives were built in two batches by Beyer, Peacock & Company in 1936–1937. They were the only class of Garratts on the Sudan Railways and were numbered 250–259. They were used on Port Sudan to Atbara and Atbara to Wad Madani routes, until they were made redundant by diesel locomotives.

In 1949, they were sold to the Rhodesia Railways where they were numbered 271 to 280 and classified as 17th class. On the RR they were used alongside the 15th and 15A classes.

In 1964 all ten locomotive were sold to the Caminhos de Ferro de Moçambique who numbered them 921 to 930. They were then used on the Beira Railroad from the port city of Beira to the Rhodesian (now Zimbabwean) border at Umtali (now Mutare).

They were still in use into the 1980s, but post-civil war, their fate is unclear; they are presumed all scrapped.

References
  • Durrant, AE. Garratt-Lokomotiven der Welt. Birkhäuser Verlag. ISBN 3-7643-1481-8.
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