TR MK class

Tanganyika Railway MK class
East African Railways 25 class
Tanganyika Railway MK class; East African Railways 25 class;
	Vulcan Foundry works photo of TR 206
Power type
Type and origin
Power type	Steam
Builder	Vulcan Foundry
Serial number	3892–3896 (1925); 3942–3947 (1926);
Build date	1925–1926
Total produced	11
Configuration:;
Specifications
Configuration:;
• Whyte	2-8-2
• UIC	1′D1' h2
Gauge	1,000 mm (3 ft 3+3⁄8 in)
Driver dia.	43 in (1,092 mm)
Adhesive weight	40.1 long tons (40.7 t)
Loco weight	57.7 long tons (58.6 t)
Fuel type	Oil
Fuel capacity	1,300 imp gal (5,900 L; 1,600 US gal)
Water cap.	3,500 imp gal (16,000 L; 4,200 US gal)
Firebox:
• Grate area	27 sq ft (2.51 m2)
Boiler pressure	160 psi (1.10 MPa) (165 psi (1.14 MPa))
Heating surface:
• Firebox	139 sq ft (12.9 m2)
• Tubes	; 1,306 sq ft (121.3 m2)
• Total surface	1,742 sq ft (161.8 m2)
Superheater:;
• Heating area	297 sq ft (27.6 m2)
Cylinders	2
Cylinder size	18 in × 23 in (457 mm × 584 mm)
Tractive effort
Performance figures
Tractive effort	24,300 lbf (108.09 kN)
Operators
Career
Operators	Tanganyika Railway (TR); → East African Railways (EAR);
Class	TR: MK class; EAR: 25 class;
Number in class	11
Numbers	TR: 206–216/400–410; EAR: 2501–2511;
Delivered	1925–1926

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]

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
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

Durrant, A E; Lewis, C P; Jorgensen, A A (1981). Steam in Africa. London: Hamlyn. ISBN 978-0-600-34946-4. OCLC 9014344. OL 15088099M. Wikidata Q111363476.
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, Wikidata Q111363477
Ramaer, Roel (1974). Steam Locomotives of the East African Railways. David & Charles Locomotive Studies. Newton Abbot, North Pomfret: David & Charles. ISBN 978-0-7153-6437-6. OCLC 832692810. OL 5110018M. Wikidata Q111363478.
Ramaer, Roel (2009). Gari la Moshi: Steam Locomotives of the East African Railways. Malmö: Stenvalls. ISBN 978-91-7266-172-1. OCLC 502034710. Wikidata Q111363479.

Media related to TR MK class at Wikimedia Commons