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The EAR 27 class, previously known as the EAR MR class, was a sub-class of 1,000 mm (3 ft 3+3⁄8 in) gauge 2-8-2 USATC S118 Class steam locomotives operated by the East African Railways (EAR), and, with one exception, previously by the Malayan Railways.

East African Railways 27 class
East African Railways publicity photograph of TR no. 803, c. 1953
Type and origin
Power typeSteam
Builder
ModelUSATC S118 Class
Build date1944 (16), 1953 (1)
Total produced17
Specifications
Configuration:
​
 • Whyte2-8-2
 • UIC1′D1' h2
Gauge1,000 mm (3 ft 3+3⁄8 in)
Leading dia.26 in (660 mm)
Driver dia.48 in (1,219 mm)
Adhesive weight35.7 long tons (36.3 t)
Loco weight52.0 long tons (52.8 t)
Fuel typeWood → Oil
Fuel capacity1,350 imp gal (6,100 l; 1,620 US gal)
Water cap.4,166 imp gal (18,940 l; 5,003 US gal)
Firebox:
 • Firegrate area		27.8 sq ft (2.58 m2)
Boiler pressure180 psi (1.24 MPa)
Heating surface1,736 sq ft (161.3 m2)
 • Tubes 
1,247 sq ft (115.9 m2)
 • Firebox115 sq ft (10.7 m2)
Superheater:
​
 • Heating area374 sq ft (34.7 m2)
Cylinders2, outside
Cylinder size16 in × 24 in (406 mm × 610 mm)
Valve gearIndirect Walschaerts
Performance figures
Tractive effort19,550 lbf (86.96 kN)
Career
Operators
  • Tanganyika Railway (TR)
  • → East African Railways (EAR)
Class
  • TR: MR class
  • EAR: 27 class
Number in class17
Numbers
  • TR: 800–805
  • EAR: 2701–2717
Delivered1929
[1]

Service history


The first eight members of the class were built in 1944, and were acquired second hand by the Tanganyika Railway (TR) from the Malayan Railways in 1949. Those locomotives entered service on the Central Line in Tanganyika in 1949. By that time, the TR had been succeeded by the EAR, which designated them for a very short time as its MR class, but then, as part of a comprehensive reclassification of all of its locomotives, redesignated and renumbered them as its 27 class.[2]

In 1950, the EAR acquired eight further 27 class locomotives from the Malayan Railways, and in 1953 another 27 class locomotive was built in the EAR's Dar es Salaam Workshops, using spare parts acquired from the Nigerian Railways. The 27 class therefore eventually reached a total of 17 locomotives.[3][4]


Class list


The builders, build year and fleet numbers of each member of the class were as follows:[5]

Builders Built TR
number		 EAR
number		 Notes
Alco 1944 800 2701
Alco 1944 801 2702
Alco 1944 802 2703
Baldwin 1944 803 2704
Baldwin 1944 804 2705
Baldwin 1944 805 2706
Davenport 1944 806 2707
Davenport 1944 807 2708
Davenport 1944 – 2709
Davenport 1944 – 2710
Baldwin 1944 – 2711
Baldwin 1944 – 2712
Baldwin 1944 – 2713
Baldwin 1944 – 2714
Baldwin 1944 – 2715
Alco 1944 – 2716
East African Railways 1953 – 2717 Built in the Dar es Salaam Workshops, using spare parts acquired from the Nigerian Railways

See also



References



Notes


  1. Ramaer 1974, pp. 67–70, 83, 84, 87.
  2. Ramaer 1974, p. 66.
  3. Ramaer 1974, pp. 71.
  4. Staff writer 1958, p. 380.
  5. Ramaer 1974, pp. 70, 82–83.

Bibliography




Media related to EAR 27 class at Wikimedia Commons



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