Metropolitan Railway K Class

Specifications
Specifications
Configuration:;
• Whyte	2-6-4T
• UIC	1'C2'ht
Leading dia.	37 in (940 mm)
Driver dia.	5 ft 6 in (1,680 mm)
Trailing dia.	37 in (940 mm)
Wheelbase	36 ft 7 in (11,150 mm)
Axle load	18.45 long tons (18.75 t; 20.66 short tons)
Loco weight	87.35 long tons (88.75 t; 97.83 short tons)
Fuel type	Coal
Fuel capacity	4.00 long tons (4.06 t; 4.48 short tons)
Water cap.	2,000 imp gal (9,100 L; 2,400 US gal)
Firebox:
• Grate area	25 sq ft (2.3 m2)
Boiler pressure	200 psi (1.38 MPa) superheated
Heating surface:
• Firebox	135 sq ft (12.5 m2)
• Tubes	1,017 sq ft (94.5 m2)
• Flues	356 sq ft (33.1 m2)
Superheater:;
• Heating area	285 sq ft (26.5 m2)
Cylinders	Two, outside
Cylinder size	19 in × 28 in (483 mm × 711 mm)
Valve gear	Walschaerts
Valve type	10 in (254 mm) piston valves

Type and origin
Type and origin
Power type	Steam
Builder	Armstrong Whitworth
Build date	1925

Metropolitan Railway K Class
LNER Class L2
Metropolitan Railway K Class ; LNER Class L2
	No. 114, circa 1928
Power type
Type and origin
Power type	Steam
Builder	Armstrong Whitworth
Build date	1925
Configuration:;
Specifications
Configuration:;
• Whyte	2-6-4T
• UIC	1'C2'ht
Leading dia.	37 in (940 mm)
Driver dia.	5 ft 6 in (1,680 mm)
Trailing dia.	37 in (940 mm)
Wheelbase	36 ft 7 in (11,150 mm)
Axle load	18.45 long tons (18.75 t; 20.66 short tons)
Loco weight	87.35 long tons (88.75 t; 97.83 short tons)
Fuel type	Coal
Fuel capacity	4.00 long tons (4.06 t; 4.48 short tons)
Water cap.	2,000 imp gal (9,100 L; 2,400 US gal)
Firebox:
• Grate area	25 sq ft (2.3 m2)
Boiler pressure	200 psi (1.38 MPa) superheated
Heating surface:
• Firebox	135 sq ft (12.5 m2)
• Tubes	1,017 sq ft (94.5 m2)
• Flues	356 sq ft (33.1 m2)
Superheater:;
• Heating area	285 sq ft (26.5 m2)
Cylinders	Two, outside
Cylinder size	19 in × 28 in (483 mm × 711 mm)
Valve gear	Walschaerts
Valve type	10 in (254 mm) piston valves
Tractive effort
Performance figures
Tractive effort	26,036 lbf (115.81 kN)
Operators
Career
Operators	Metropolitan Railway; London and North Eastern Railway
Class	MET: K; LNER L2
Number in class	6
Numbers	MET:111–116; LNER 6158–6163
Retired	1943–1948
Disposition	All scrapped

The Metropolitan Railway K Class consisted of six 2-6-4T steam locomotives, numbered 111 to 116.^[1]

Construction

They were built by Armstrong Whitworth in 1925, using parts manufactured at the Royal Arsenal, Woolwich, to the design of the South Eastern and Chatham Railway N class 2-6-0 locomotives and part of a family of 200 or so "mogul" engines designed by Richard Maunsell.^[2] Final design was by the Metropolitan Railway's George Hally.^[3] The boilers had been made by Robert Stephenson and Company of Darlington.^[4] Some unusual variations included footsteps below the buffer beam and curved handrails at the front either side of the smokebox.^[2]

Service

The K Class were used on heavy freight trains along London's Metropolitan Railway mainline, including coal to the power station at Neasden,^[1] although they were used on occasional passenger trains. In 1937, all six were transferred to the London and North Eastern Railway (LNER) where they were based at Neasden (LNER) Shed. The LNER numbered them 6158–6163, and classified them as L2 Class.^[1] They were used for passenger services for a short stint in 1938 and 1942 when H2 4-4-4T's were unavailable for maintenance or transferred elsewhere.^[3]

Withdrawal

All were withdrawn and scrapped between 1943 and 1948.^[2]

References

^ ^a ^b ^c Casserley, H.C. (1977). The Later Years of Metropolitan Steam. Truro: D.Bradford Barton. pp. 7, 34–39. ISBN 0-85153-327-2.
^ ^a ^b ^c Swift, Peter (2012). Maunsell Moguls. Ian Allan. pp. 86–90. ISBN 9780711034006.
^ ^a ^b "The Maunsell / Hally Class L2 (Metropolitan Class K) 2-6-4T Tank Locomotives". The London & North Eastern Railway Encyclopedia. Archived from the original on 26 August 2018. Retrieved 20 May 2019.
^ Boddy, M.G.; Brown, W.A.; Fry, E.V.; Hennigan, W.; Hoole, Ken; Manners, F.; Neve, E.; Platt, E.N.T.; Proud, P.; Yeadon, W.B. (March 1977). Fry, E.V. (ed.). Locomotives of the L.N.E.R., part 9A: Tank Engines - Classes L1 to N19. Kenilworth: RCTS. p. 10. ISBN 0-901115-40-1.

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[Casserley,_Later_Metropolitan_Steam-1] Casserley, H.C. (1977). The Later Years of Metropolitan Steam. Truro: D.Bradford Barton. pp. 7, 34–39. ISBN 0-85153-327-2.

[MM-2] Swift, Peter (2012). Maunsell Moguls. Ian Allan. pp. 86–90. ISBN 9780711034006.

[LNER-H2-3] "The Maunsell / Hally Class L2 (Metropolitan Class K) 2-6-4T Tank Locomotives". The London & North Eastern Railway Encyclopedia. Archived from the original on 26 August 2018. Retrieved 20 May 2019.

[4] Boddy, M.G.; Brown, W.A.; Fry, E.V.; Hennigan, W.; Hoole, Ken; Manners, F.; Neve, E.; Platt, E.N.T.; Proud, P.; Yeadon, W.B. (March 1977). Fry, E.V. (ed.). Locomotives of the L.N.E.R., part 9A: Tank Engines - Classes L1 to N19. Kenilworth: RCTS. p. 10. ISBN 0-901115-40-1.

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