- Disambiguation: LNER Thompson Class A2
| LNER Thompson Class A2/3 |
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No. 517 Ocean Swell in 1947 |
| Type and origin |
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| Power type | Steam |
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| Designer | Edward Thompson |
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| Build date | 1946 |
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| Total produced | 15 |
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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 | 101.5 long tons (103.1 t) |
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| Boiler pressure | 250 psi (1.72 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) Class A2/3 was a class of 4-6-2 steam locomotives. They were newly constructed locomotives, fulfilling the requirement identified by Edward Thompson for a standard express passenger locomotive of the 4-6-2 arrangement with 6 ft 2 in (1.880 m) driving wheels. Fifteen engines were constructed according to this original design, but following the retirement of Thompson as CME, the remaining fifteen locomotives that were planned were immediately redesigned and ultimately emerged as Peppercorn Class A2.
