LNER Class A4

Specifications
Specifications
Configuration:;
• Whyte	4-6-2
• UIC	2'C1h
Gauge	4 ft 8 1⁄2 in (1,435 mm)
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)
Loco weight	102 tons 19 cwt (230,600 lb or 104.6 t)
Total weight	167 tons 2 cwt (374,300 lb or 169.8 t)
Fuel type	Coal
Fuel capacity	8 tons 0 cwt (17,900 lb or 8.1 t)
Water cap	5,000 imperial gallons (23,000 L; 6,000 US gal)
Boiler pressure	250 psi (1.72 MPa)
Cylinders	Three
Cylinder size	18.5 in × 26 in (470 mm × 660 mm)
Loco brake	Vacuum
Train brakes	Vacuum; 60009, 60007 & 60019 have been fitted with air brakes

Type and origin
Type and origin
Power type	Steam
Designer	H. N. Gresley
Builder	LNER Doncaster Works
Build date	1935–1938
Total produced	35

LNER Class A4
LNER Class A4
	60009 Union of South Africa in 1951
Power type
Type and origin
Power type	Steam
Designer	H. N. Gresley
Builder	LNER Doncaster Works
Build date	1935–1938
Total produced	35
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-2
• UIC	2'C1h
Gauge	4 ft 8 1⁄2 in (1,435 mm)
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)
Loco weight	102 tons 19 cwt (230,600 lb or 104.6 t)
Total weight	167 tons 2 cwt (374,300 lb or 169.8 t)
Fuel type	Coal
Fuel capacity	8 tons 0 cwt (17,900 lb or 8.1 t)
Water cap	5,000 imperial gallons (23,000 L; 6,000 US gal)
Boiler pressure	250 psi (1.72 MPa)
Cylinders	Three
Cylinder size	18.5 in × 26 in (470 mm × 660 mm)
Loco brake	Vacuum
Train brakes	Vacuum; 60009, 60007 & 60019 have been fitted with air brakes
Maximum speed
Performance figures
Maximum speed	90 miles per hour (140 km/h) in Regular Service (126.4 mph (203.4 km/h) maximum recorded)
Tractive effort	35,455 lbf (157.71 kN)
Operators
Career
Operators	LNER, BR
Class	A4
Power class	BR: 8P6F
Number in class	35
Numbers	LNER: 2509–2512, 4462–4469, 4482–4500, 4900–4903,; LNER 1–34 (not in order),; BR: 60001–60034
Nicknames	"Streak"
Withdrawn	1942, 1962–1966
Disposition	6 preserved

The LNER Class A4 was a type of steam locomotive made in England in 1935. It was designed by Sir Nigel Gresley for the London North Eastern Railway. 35 locomotives were built in total.

They were designed to be very fast and had a very sleek shape. One of them, 4468 "Mallard", is the fastest steam locomotive ever made. It set a world speed record of 126 mph (202.7 km/h) on July 3, 1938.

Six A4s still exist today. The rest were scrapped when steam stopped being used to power trains in Britain.

Sources

↑ Fox, Peter; Hall, Peter & Pritchard, Robert (2007). Preserved Locomotives of British Railways (Twelfth edition). Platform 5, Sheffield. ISBN 978-1-902336-57-2.{cite book}: CS1 maint: multiple names: authors list (link)

Other websites

LNER Encyclopedia Page covering the history and development of the LNER A4 Pacifics

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[P5Pres-1] Fox, Peter; Hall, Peter & Pritchard, Robert (2007). Preserved Locomotives of British Railways (Twelfth edition). Platform 5, Sheffield. ISBN 978-1-902336-57-2.{cite book}: CS1 maint: multiple names: authors list (link)

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