| LNER Peppercorn Class A2 |
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60530 Sayajirao at Dundee Tay Bridge in April 1966 |
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| Specifications |
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Configuration:
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| • Whyte | 4-6-2 |
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| • UIC | 2′C1′ h3 |
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| Gauge | 4 ft 8+1⁄2 in (1,435 mm) |
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| Leading dia. | 3 ft 2 in (0.965 m) |
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| Driver dia. | 6 ft 2 in (1.880 m) |
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| Trailing dia. | 3 ft 8 in (1.118 m) |
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| Wheelbase | 60 ft 6 in (18.44 m) |
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| • Engine | 34 ft 4 in (10.46 m) |
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| • Coupled | 13 ft 0 in (3.96 m) |
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| Length | 71 ft 0.5 in (21.654 m) |
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| Axle load | 22 long tons (22.4 t; 24.6 short tons) |
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| Loco weight | 101 long tons (102.6 t; 113.1 short tons) |
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| Total weight | 160.5 long tons (163.1 t; 179.8 short tons) |
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| Fuel type | Coal |
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| Fuel capacity | 9 long tons (9.1 t; 10.1 short tons) |
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| Water cap. | 5,000 imp gal (23,000 L; 6,000 US gal) |
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| Firebox: | |
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| • Grate area | 50 sq ft (4.6 m2) |
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| Boiler pressure | 250 psi (1.72 MPa) |
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| Heating surface: | |
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| • Firebox | 245 sq ft (22.8 m2) |
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| • Tubes | 1,212 sq ft (112.6 m2) |
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| • Flues | 1,005 sq ft (93.4 m2) |
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| • Total surface | 2,461 sq ft (228.6 m2) |
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Superheater:
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| • Heating area | 680 sq ft (63 m2) |
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| Cylinders | Three |
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| Cylinder size | 19 in × 26 in (483 mm × 660 mm) |
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| Valve gear | Walschaerts |
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| Valve type | Piston valves |
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The London and North Eastern Railway (LNER) Peppercorn Class A2 is a class of steam locomotive designed for express passenger work by Arthur Peppercorn, the chief designer of the LNER after Edward Thompson. All save the first of the 15 built were constructed under British Railways after nationalisation in 1948. Only one example is preserved.
