| LMS Stanier Class 4P 2-cylinder 2-6-4T |
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42444 at Bacup station, June 1959 |
| Type and origin |
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| Power type | Steam |
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| Designer | William Stanier |
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| Builder | |
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| Build date | 1935–1943 |
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| Total produced | 206 |
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| Specifications |
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Configuration:
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| • Whyte | 2-6-4T |
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| • UIC | 1′C2′ h2t |
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| Gauge | 4 ft 8+1⁄2 in (1,435 mm) standard gauge |
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| Leading dia. | 3 ft 3+1⁄2 in (1.003 m) |
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| Driver dia. | 5 ft 9 in (1.753 m) |
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| Trailing dia. | 3 ft 3+1⁄2 in (1.003 m) |
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| Wheelbase | 38 ft 6 in (11.73 m) |
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| Length | 47 ft 2+3⁄4 in (14.40 m) |
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| Loco weight | 87.85 long tons (89.26 t; 98.39 short tons) |
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| Fuel type | Coal |
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| Fuel capacity | 3.5 long tons (3.6 t; 3.9 short tons) |
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| Water cap. | 2,000 imp gal (9,100 L; 2,400 US gal) |
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| Firebox: | |
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| • Grate area | 26+3⁄4 sq ft (2.49 m2) |
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| Boiler | LMS type 4C |
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| Boiler pressure | 200 lbf/in2 (1.4 MPa) |
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| Heating surface: | |
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| • Firebox | 139 or 143 sq ft (12.9 or 13.3 m2) |
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| • Tubes and flues | 1,126 or 1,223 sq ft (104.6 or 113.6 m2) |
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Superheater:
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| • Heating area | 185 to 285 sq ft (17.2 to 26.5 m2) |
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| Cylinders | Two, outside |
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| Cylinder size | 19+5⁄8 in × 26 in (500 mm × 660 mm) |
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| Valve gear | Walschaerts |
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| Career |
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| Operators | |
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| Power class | |
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| Withdrawn | 1960–1967 |
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| Disposition | All scrapped |
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Sir William Stanier's London, Midland and Scottish Railway (LMS) Class 4P 2-Cylinder 2-6-4T was a class of 206 steam locomotives built between 1935 and 1943.