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LNER Class A8
A8 4-6-2T No. 69873 at Middlesbrough Locomotive Depot 1954
Type and origin
Power type
Steam
Designer
Vincent Raven and Nigel Gresley
Build date
1931–1936
Total produced
45
Specifications
Configuration:
• Whyte
4-6-2T
• UIC
2′C1′ h3t
Leading dia.
3 ft 1+1⁄4 in (0.946 m)
Driver dia.
5 ft 9 in (1.753 m)
Trailing dia.
3 ft 9 in (1.143 m)
Wheelbase
33 ft 3 in (10.13 m)
Length
42 ft 6 in (12.95 m)
Axle load
17.8 long tons (18.1 t; 19.9 short tons)
Loco weight
86.8 long tons (88.2 t; 97.2 short tons)
Fuel capacity
4 long tons (4.1 t; 4.5 short tons)
Water cap.
2,000 imp gal (9,100 L; 2,400 US gal)
Firebox:
• Grate area
23 sq ft (2.1 m2)
Boiler
4 ft 9 in (1.45 m)
Boiler pressure
175 psi (1.21 MPa)
Heating surface:
• Firebox
124 sq ft (11.5 m2)
• Tubes
680 sq ft (63 m2)
• Flues
280.6 sq ft (26.07 m2)
• Total surface
1,084.6 sq ft (100.76 m2)
Superheater:
• Heating area
191.134 sq ft (17.757 m2)
Cylinders
3
Cylinder size
16+1⁄2 in × 26 in (419 mm × 660 mm)
Valve gear
Stephenson
Performance figures
Tractive effort
22,940 lbf (102.0 kN)
Career
Operators
London and North Eastern Railway, British Railways
Withdrawn
1957–1960
Disposition
All scrapped
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