LNER Class D49

LNER Class D49
LNER Class D49
	Preserved D49 class no. 246 Morayshire at Doncaster Works
Power type
Type and origin
Power type	Steam
Designer	Nigel Gresley
Builder	LNER Darlington Works
Build date	1927–1935
Total produced	76
Configuration:;
Specifications
Configuration:;
• Whyte	4-4-0
• UIC	2′B h3
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	3 ft 1+1⁄4 in (0.946 m)
Driver dia.	6 ft 8 in (2.032 m)
Axle load	21.25 long tons (21.59 t; 23.80 short tons)
Adhesive weight	42.00 long tons (42.67 t; 47.04 short tons)
Loco weight	65.11 long tons (66.15 t; 72.92 short tons)
Tender weight	52.65 long tons (53.49 t; 58.97 short tons)
Fuel type	Coal
Firebox:
• Grate area	26 square feet (2.4 m2)
Boiler	LNER Diagram 97
Boiler pressure	180 psi (1.24 MPa)
Heating surface:
• Firebox	171.5 square feet (15.93 m2)
• Tubes	871.75 square feet (80.988 m2)
• Flues	354.53 square feet (32.937 m2)
Superheater:;
• Heating area	271.8 square feet (25.25 m2)
Cylinders	Three
Cylinder size	17 in × 26 in (432 mm × 660 mm)
Tractive effort
Performance figures
Tractive effort	21,556 lbf (95.9 kN)
Operators
Career
Operators	LNER » BR
Power class	BR: 4P
Axle load class	Route availability 8
Withdrawn	1957–1961
Disposition	One preserved, remainder scrapped

The London and North Eastern Railway (LNER) D49 Class is a class of 4-4-0 steam locomotives designed by Nigel Gresley. They were named after fox hunts and shires.

One, 246/62712 Morayshire has been preserved on the Bo'ness and Kinneil Railway.

Sub-classes

D49/1 Introduced 1927 with Walschaerts and, Gresley conjugated valve gear with 8-inch (203 mm) piston valves
D49/2 Introduced 1928 with Lentz rotary-cam poppet valves
D49/3 Introduced 1928 with Lentz oscillating-cam poppet valves

On 3 January 1931, locomotive No. 2758 Northumberland was hauling a passenger train that was derailed at Carlisle, Cumberland due to excessive speed through a curve. Three people were killed.^[1]
In July 1958, locomotive No. 62703 Hertfordshire ran into the turntable pit at Bridlington, Yorkshire and rolled into its side.^[2]

^ Hall, Stanley (1990). The Railway Detectives. London: Ian Allan. p. 97. ISBN 0 7110 1929 0.
^ Hoole, Ken (1983). Trains in Trouble: Vol. 4. Redruth: Atlantic Books. p. 39. ISBN 0 906899 07 9.

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