- Disambiguation: LNER Thompson Class A2
| LNER Thompson Class A2/1 |
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60507 'Highland Chieftain' waits for departure at Carlisle in August 1960. |
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| Specifications |
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Configuration:
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| • Whyte | 4-6-2 |
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| Gauge | 4 ft 8+1⁄2 in (1,435 mm) |
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| Driver dia. | 6 ft 2 in (1.880 m) |
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| Loco weight | 98 long tons (100 t) |
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| Boiler pressure | 225 psi (1.55 MPa) |
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| Cylinders | Three |
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| Cylinder size | 19 in × 26 in (483 mm × 660 mm) |
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The London and North Eastern Railway (LNER) Thompson Class A2/1 was a class of 4-6-2 steam locomotives built at Darlington locomotive works during 1944. They were originally ordered as Class V2 locomotives, as designed by Sir Nigel Gresley, but were revised during construction into a 4-6-2 'Pacific' arrangement under the instruction of Edward Thompson.