GNR Class A1 1470 Great Northern information

Specifications
Specifications
Configuration:;
• Whyte	4-6-2
• UIC	2′C1 h3
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	3 ft 2 in (0.965 m)
Driver dia.	6 ft 8 in (2.032 m)
Trailing dia.	3 ft 8 in (1.118 m)
Wheelbase	60 ft 10.6 in (18.56 m)
Length	70 ft 5 in (21.46 m)
Axle load	20 long tons (20.3 t; 22.4 short tons)
Adhesive weight	60 long tons (61.0 t; 67.2 short tons)
Loco weight	91.35 long tons (92.82 t; 102.31 short tons)
Tender weight	Various
Tender type	Various
Fuel type	Coal
Fuel capacity	8 long tons (8.1 t; 9.0 short tons)
Water cap.	5,000 imp gal (22,700 L; 6,000 US gal)
Firebox:
• Grate area	41.25 sq ft (3.832 m2)
Boiler pressure	180 psi (1.24 MPa)
Heating surface:
• Firebox	215 sq ft (20.0 m2)
• Tubes	1,880 sq ft (175 m2)
• Flues	835 sq ft (77.6 m2)
Superheater:;
• Heating area	525 sq ft (48.8 m2)
Cylinders	Three
Cylinder size	20 in × 26 in (508 mm × 660 mm)
Valve gear	Outside:Walschaerts; Inside: Gresley conjugated
Valve type	Piston valves
Loco brake	Vacuum

Type and origin
Type and origin
Power type	Steam
Designer	H.N Gresley
Builder	Doncaster Works
Serial number	1536
Model	GNR/ LNER A1
Build date	April 1922

1470 Great Northern ^[1]
1470 Great Northern
Power type
Type and origin
Power type	Steam
Designer	H.N Gresley
Builder	Doncaster Works
Serial number	1536
Model	GNR/ LNER A1
Build date	April 1922
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-2
• UIC	2′C1 h3
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	3 ft 2 in (0.965 m)
Driver dia.	6 ft 8 in (2.032 m)
Trailing dia.	3 ft 8 in (1.118 m)
Wheelbase	60 ft 10.6 in (18.56 m)
Length	70 ft 5 in (21.46 m)
Axle load	20 long tons (20.3 t; 22.4 short tons)
Adhesive weight	60 long tons (61.0 t; 67.2 short tons)
Loco weight	91.35 long tons (92.82 t; 102.31 short tons)
Tender weight	Various
Tender type	Various
Fuel type	Coal
Fuel capacity	8 long tons (8.1 t; 9.0 short tons)
Water cap.	5,000 imp gal (22,700 L; 6,000 US gal)
Firebox:
• Grate area	41.25 sq ft (3.832 m2)
Boiler pressure	180 psi (1.24 MPa)
Heating surface:
• Firebox	215 sq ft (20.0 m2)
• Tubes	1,880 sq ft (175 m2)
• Flues	835 sq ft (77.6 m2)
Superheater:;
• Heating area	525 sq ft (48.8 m2)
Cylinders	Three
Cylinder size	20 in × 26 in (508 mm × 660 mm)
Valve gear	Outside:Walschaerts; Inside: Gresley conjugated
Valve type	Piston valves
Loco brake	Vacuum
Tractive effort
Performance figures
Tractive effort	29,835 lbf (132.71 kN)
Operators
Career
Operators	Great Northern Railway; London and North Eastern Railway;
Numbers	1470 (1922–23); 1470N (1923–25); 4470 (1925–45);
Official name	Great Northern
Axle load class	Route Availability: 9
Withdrawn	1945 (for rebuilding)
Disposition	rebuilt as LNER Thompson Class A1/1

The Great Northern Railway Class A1 1470 Great Northern was the first of 52 A1 class locomotives. It has also represented three distinct stages in the history of the British 4-6-2 "Pacific" steam locomotives designed by Nigel Gresley for the Great Northern Railway (GNR), a constituent company of the London and North Eastern Railway before the amalgamation of 1923, for which they became a standard design. Eventually Great Northern was completely rebuilt as Class A1/1.

^ Herring: Classic British Steam Locomotives pp. 106–107

[Herring1-1] Herring: Classic British Steam Locomotives pp. 106–107

GNR Class A1 1470 Great Northern information

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