LNER Thompson Class A2/2

Specifications
Specifications
Configuration:;
• Whyte	4-6-2
• UIC	2’C1 h3
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Leading dia.	3 ft 2 in (0.965 m)
Driver dia.	6 ft 2 in (1.880 m)
Trailing dia.	3 ft 8 in (1.118 m)
Wheelbase	63 ft 0.875 in (19.22 m)
Length	72 ft 8.375 in (22.16 m)
Adhesive weight	66 long tons (67 t; 74 short tons)
Loco weight	101.5 long tons (103.1 t; 113.7 short tons)
Fuel type	Coal
Fuel capacity	9 long tons (9.1 t; 10 short tons)
Water cap.	5,000 imp gal (22,700 L; 6,000 US gal)
Firebox:
• Grate area	50 sq ft (4.6 m2)
Boiler pressure	225 psi (1.55 MPa)
Heating surface:
• Firebox	237 sq ft (22.0 m2)
• Tubes	1,004.5 sq ft (93.32 m2)
• Flues	1,211.57 sq ft (112.559 m2)
• Total surface	2,453 sq ft (227.9 m2)
Superheater:;
• Heating area	619.67 sq ft (57.569 m2)
Cylinders	Three
Cylinder size	20 in × 26 in (508 mm × 660 mm)
Valve gear	Walschaerts
Valve type	Piston valves

Type and origin
Type and origin
Power type	Steam
Designer	Edward Thompson
Build date	1934-1936
Total produced	6
Rebuild date	1943-1944

LNER Thompson Class A2/2
LNER Thompson Class A2/2
	No. 60503 'Lord President' at London King's Cross railway station in 1958
Power type
Type and origin
Power type	Steam
Designer	Edward Thompson
Build date	1934-1936
Total produced	6
Rebuild date	1943-1944
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-2
• UIC	2’C1 h3
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Leading dia.	3 ft 2 in (0.965 m)
Driver dia.	6 ft 2 in (1.880 m)
Trailing dia.	3 ft 8 in (1.118 m)
Wheelbase	63 ft 0.875 in (19.22 m)
Length	72 ft 8.375 in (22.16 m)
Adhesive weight	66 long tons (67 t; 74 short tons)
Loco weight	101.5 long tons (103.1 t; 113.7 short tons)
Fuel type	Coal
Fuel capacity	9 long tons (9.1 t; 10 short tons)
Water cap.	5,000 imp gal (22,700 L; 6,000 US gal)
Firebox:
• Grate area	50 sq ft (4.6 m2)
Boiler pressure	225 psi (1.55 MPa)
Heating surface:
• Firebox	237 sq ft (22.0 m2)
• Tubes	1,004.5 sq ft (93.32 m2)
• Flues	1,211.57 sq ft (112.559 m2)
• Total surface	2,453 sq ft (227.9 m2)
Superheater:;
• Heating area	619.67 sq ft (57.569 m2)
Cylinders	Three
Cylinder size	20 in × 26 in (508 mm × 660 mm)
Valve gear	Walschaerts
Valve type	Piston valves
Tractive effort
Performance figures
Tractive effort	40,318 lbf (179.34 kN)
Operators
Career
Operators	London and North Eastern Railway ; British Railways
Class	A2/2
Power class	BR: 8P7F
Numbers	LNER: 501-506; ; BR: 60501-60506
Withdrawn	1959 – 1961
Disposition	All scrapped

The London and North Eastern Railway Class A2/2 was a class of six 4-6-2 steam locomotives rebuilt by Edward Thompson in 1943 and 1944 from his predecessor Sir Nigel Gresley's P2 Class of 2-8-2 express passenger locomotives. The rebuilds improved reliability and reduced maintenance, but also suffered from a variety of issues during service, and all were withdrawn and scrapped between 1959 and 1961.

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