TR MK class

The TR MK class, later known as the EAR 25 class, was a class of 1,000 mm (3 ft 3 3⁄8 in) gauge 2-8-2 steam locomotives. The eleven members of the class were built by Vulcan Foundry, in Newton-le-Willows, Lancashire (now part of Merseyside), England, for the Tanganyika Railway (TR). They entered service on the TR in 1925–1926, and were later operated by the TR's successor, the East African Railways (EAR).[2]

  • Tanganyika Railway MK class
  • East African Railways 25 class
Vulcan Foundry works photo of TR 206
Type and origin
Power typeSteam
BuilderVulcan Foundry
Serial number
  • 3892–3896 (1925)
  • 3942–3947 (1926)
Build date1925–1926
Total produced11
Specifications
Configuration:
​
 • Whyte2-8-2
 • UIC1′D1' h2
Gauge1,000 mm (3 ft 3 3⁄8 in)
Driver dia.43 in (1,092 mm)
Adhesive weight40.1 long tons (40.7 t)
Loco weight57.7 long tons (58.6 t)
Fuel typeOil
Fuel capacity1,300 imp gal (5,900 l; 1,600 US gal)
Water cap3,500 imp gal (16,000 l; 4,200 US gal)
Firebox:
 • Firegrate area		27 sq ft (2.51 m2)
Boiler pressure160 psi (1.10 MPa) (165 psi (1.14 MPa))
Heating surface1,742 sq ft (161.8 m2)
 • Tubes 
1,306 sq ft (121.3 m2)
 • Firebox139 sq ft (12.9 m2)
Superheater:
​
 • Heating area297 sq ft (27.6 m2)
Cylinders2
Cylinder size18 in × 23 in (457 mm × 584 mm)
Performance figures
Tractive effort24,300 lbf (108.09 kN)
Career
Operators
  • Tanganyika Railway (TR)
  • → East African Railways (EAR)
Class
  • TR: MK class
  • EAR: 25 class
Number in class11
Numbers
  • TR: 206–216/400–410
  • EAR: 2501–2511
Delivered1925–1926
[1]

Class list

The builder's number, build year and fleet numbers of each member of the class were as follows:[3]

Builder's
number		 Built 1st TR
number		 2nd TR
number		 EAR
number		 Notes
3892 1925 206 400 2501
3893 1925 207 401 2502
3894 1925 208 402 2503
3895 1925 209 403 2504
3896 1925 210 404 2505
3942 1926 211 405 2506
3943 1926 212 406 2507
3944 1926 213 407 2508
3945 1926 214 408 2509
3946 1926 215 409 2510
3947 1926 216 410 2511
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See also

References

Notes
  1. Ramaer 1974, pp. 57–58, 62, 84, 87.
  2. Ramaer 1974, pp. 57–58, 84.
  3. Ramaer 1974, p. 62.

Bibliography
  • Durrant, A E; Lewis, C P; Jorgensen, A A (1981). Steam in Africa. London: Hamlyn. ISBN 0600349462.
  • Patience, Kevin (1976). Steam in East Africa: a pictorial history of the railways in East Africa, 1893-1976. Nairobi: Heinemann Educational Books (E.A.) Ltd. OCLC 3781370.
  • Ramaer, Roel (1974). Steam Locomotives of the East African Railways. David & Charles Locomotive Studies. Newton Abbot, Devon, UK; North Pomfret, Vt, USA: David & Charles. ISBN 0715364375.
  • Ramaer, Roel (2009). Gari la Moshi: Steam Locomotives of the East African Railways. Malmö, Sweden: Stenvalls. ISBN 9789172661721.

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