| NCC Class A1 |
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| Type and origin |
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| Power type | Steam |
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| Builder | BNCR / NCC, York Road works, Belfast
MR, Derby Works |
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| Build date | 1901–1908 |
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| Rebuilder | NCC, York Road works, Belfast |
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| Rebuild date | 1927–1936 |
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| Specifications |
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Configuration:
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| • Whyte | 4-4-0 |
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| • UIC | 2'Bh |
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| Gauge | 5 ft 3 in (1,600 mm) |
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| Leading dia. | 3 ft 0 in (0.914 m) |
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| Driver dia. | 6 ft 0 in (1.829 m) |
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| Wheelbase | 40 ft 11 in (12.47 m) including tender |
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| Length | 49 ft 7+3⁄4 in (15.13 m) |
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| Width | 8 ft 4 in (2.54 m) |
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| Height | 13 ft 2 in (4.01 m) |
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| Axle load | 16 long tons 8 cwt (36,700 lb or 16,646.8 kg) |
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| Adhesive weight | 30 long tons 9 cwt (68,200 lb or 30,900 kg) |
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| Loco weight | 46 long tons 7 cwt (103,800 lb or 47,100 kg) |
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| Total weight | 75 long tons 4 cwt (168,400 lb or 76,400 kg) |
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| Fuel type | Coal |
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| Fuel capacity | 6.0 long tons (6.1 t; 6.7 short tons) |
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| Water cap. | 2,090 imp gal (9,500 L; 2,510 US gal)
No.34: 2,590 imp gal (11,800 L; 3,110 US gal)
No.62: 2,690 imp gal (12,200 L; 3,230 US gal) |
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| Boiler pressure | 200 psi (1.38 MPa) |
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| Heating surface: | |
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| • Firebox | 103 sq ft (9.6 m2) |
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| • Tubes | 508.7 sq ft (47.26 m2) |
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| • Total surface | 1,038 sq ft (96.4 m2) |
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Superheater:
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| • Heating area | 233.7 sq ft (21.71 m2) |
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| Cylinders | Two |
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| Cylinder size | 18 in × 24 in (457 mm × 610 mm) |
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| Valve gear | Walschaerts |
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| Train brakes | Automatic vacuum |
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| Career |
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| Operators | LMS NCC / UTA |
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| Number in class | 9 |
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| Nicknames | Whippet |
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| Scrapped | 1947–1954 |
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The LMS (Northern Counties Committee) Class A1 4-4-0 passenger steam locomotives were rebuilds of Belfast and Northern Counties Railway Class A two-cylinder compound locomotives. They operated services throughout the NCC’s 5 ft 3 in (1,600 mm) broad gauge system in the north-east of Ireland.