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Specifications
Specifications
Configuration:;
• Whyte	0-6-0
• UIC	C n2
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Driver dia.	4 ft 11 in (1.499 m)
Wheelbase	35 ft 5 in (10.80 m)
Length	47 ft 3 in (14.40 m) over buffers
Loco weight	38 long tons 18.5 cwt (87,200 lb or 39.5 t)
Fuel type	Coal
Firebox:
• Grate area	18.0 sq ft (1.67 m2)
Boiler pressure	160 lbf/in2 (1.10 MPa)
Heating surface	1,199.5 sq ft (111.44 m2)
Cylinders	Two, inside
Cylinder size	17.5 in × 24 in (444 mm × 610 mm)

Type and origin
Type and origin
Power type	Steam
Designer	James Holden
Builder	Stratford Works
Build date	1893–1898
Total produced	81 (+1 rebuilt from Class 127)

GER Class N31
LNER Class J14
GER Class N31; LNER Class J14
	Great Eastern Class N31 locomotive 998
Power type
Type and origin
Power type	Steam
Designer	James Holden
Builder	Stratford Works
Build date	1893–1898
Total produced	81 (+1 rebuilt from Class 127)
Configuration:;
Specifications
Configuration:;
• Whyte	0-6-0
• UIC	C n2
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Driver dia.	4 ft 11 in (1.499 m)
Wheelbase	35 ft 5 in (10.80 m)
Length	47 ft 3 in (14.40 m) over buffers
Loco weight	38 long tons 18.5 cwt (87,200 lb or 39.5 t)
Fuel type	Coal
Firebox:
• Grate area	18.0 sq ft (1.67 m2)
Boiler pressure	160 lbf/in2 (1.10 MPa)
Heating surface	1,199.5 sq ft (111.44 m2)
Cylinders	Two, inside
Cylinder size	17.5 in × 24 in (444 mm × 610 mm)
Tractive effort
Performance figures
Tractive effort	16,942 lbf (75.36 kN)
Operators
Career
Operators	GER » LNER
Class	GER: N31; LNER: J14
Nicknames	Swifts
Withdrawn	1908–1925

The GER Class N31 was a class of eighty-two 0-6-0 steam locomotives designed by James Holden for the Great Eastern Railway. Eighteen passed to the London and North Eastern Railway (LNER) at the 1923 grouping and received the LNER classification J14.

History

These goods locomotives had 17.5-by-24-inch (444 mm × 610 mm) cylinders, 4-foot-11-inch (1.499 m) driving wheels, and a 160-pound-force-per-square-inch (1,100 kPa) boiler. Eighty-one were built at Stratford Works between 1893 and 1898.

Table of orders and numbers

Table of orders and numbers^[1]
Year	Order	Quantity	GER Nos.
1893	N31	1	999
1893	H33	10	979–988
1894	L33	10	989–998
1894	E34	10	969–978
1896	N37	10	959–968
1897	H40	10	949–958
1897	O41	10	602–608, 946–948
1898	G42	10	542–551
1898	K43	10	562–571

Class 127

In addition, when the Class 127 locomotive was rebuilt from compound to simple in 1895, it was then included into Class N31.^[1]

Performance

They were not particularly successful locomotives. Although nicknamed Swifts, they were sluggish locomotives, due to the placement of the valve chests underneath the cylinders.^[1]^[2]

Withdrawals

Withdrawals started in 1908, and by the end of 1922, only eighteen were left in service. The LNER allocated numbers 7000 higher than the locomotives' GER numbers, but withdrawals continued, and by 1925 the class was extinct.

Table of withdrawals^[3]
Year	Quantity in service at start of year	Quantity withdrawn	Locomotive numbers
1908	82	1	971
1909	81	18	546, 549, 565, 566, 570, 571, 602, 605, 608, 950, 953–955, 957, 966, 969, 972, 975
1910	63	14	542, 550, 563, 568, 569, 603, 606, 956, 962, 974, 982, 989, 990, 991
1911	49	9	547, 551, 562, 567, 958, 960, 961, 988, 997
1912	40	6	544, 949, 952, 967, 968, 996
1913	34	3	607, 979, 935 (ex-127)
1914	31	3	0545, 0564, 947
1915	28	1	946
1916	27	1	994
1920	26	2	0543, 999
1921	24	1	965
1922	23	5	548, 948, 986, 992, 995
1923	18	6	959, 970, 976, 980, 985, 993
1924	12	5	951, 963, 964, 977, 978
1925	7	7	604, 973, 981, 983, 984, 987, 998