SER Q class

Specifications
Configuration:;
• Whyte	0-4-4T
• UIC	B2′ n2
Gauge	4 ft 8 1⁄2 in (1,435 mm)
Driver dia.	5 ft 6 in (1.676 m)
Trailing dia.	3 ft 0 in (0.914 m)
Wheelbase	22 ft (7 m)
Axle load	16 long tons (16.3 t)
Loco weight	48.65 long tons (49.4 t)
Fuel type	Coal
Fuel capacity	0.15 long tons (0.2 t)
Water cap	1,050 imp gal (4,800 L; 1,260 US gal)
Firebox:; • Firegrate area	16 sq ft (1 m2)
Boiler pressure	140 lbf/in2 (0.97 MPa)
Heating surface:; • Tubes and flues	922.5 sq ft (85.70 m2)
Cylinders	Two, inside
Cylinder size	18 in × 26 in (457 mm × 660 mm)
Valve gear	Stephenson

Type and origin
Power type	Steam
Designer	James Stirling
Build date	1881–1897
Total produced	118

SER Q class
Type and origin
Power type	Steam
Designer	James Stirling
Build date	1881–1897
Total produced	118
Specifications
Configuration:;
• Whyte	0-4-4T
• UIC	B2′ n2
Gauge	4 ft 8 1⁄2 in (1,435 mm)
Driver dia.	5 ft 6 in (1.676 m)
Trailing dia.	3 ft 0 in (0.914 m)
Wheelbase	22 ft (7 m)
Axle load	16 long tons (16.3 t)
Loco weight	48.65 long tons (49.4 t)
Fuel type	Coal
Fuel capacity	0.15 long tons (0.2 t)
Water cap	1,050 imp gal (4,800 L; 1,260 US gal)
Firebox:; • Firegrate area	16 sq ft (1 m2)
Boiler pressure	140 lbf/in2 (0.97 MPa)
Heating surface:; • Tubes and flues	922.5 sq ft (85.70 m2)
Cylinders	Two, inside
Cylinder size	18 in × 26 in (457 mm × 660 mm)
Valve gear	Stephenson
Performance figures
Tractive effort	15,189 lbf (67.56 kN)
Career
Operators	South Eastern Railway; → South Eastern and Chatham Railway; → Southern Railway;
Class	Q
Number in class	1 January 1923: 32
Withdrawn	1907–1929
Disposition	All scrapped

The SER Q class was a class of 0-4-4T steam locomotives of the South Eastern Railway. The class was designed by James Stirling and introduced in 1881.[1] These locomotives should not be confused with the later SR Q class 0-6-0.

Rebuilding

The locomotives passed to the South Eastern and Chatham Railway in 1899 and 55 were rebuilt by Harry Wainwright to class Q1 between 1903 and 1919.

Numbering

Thirty-two unrebuilt locomotives survived into Southern Railway ownership on 1 January 1923 with random numbers between 6 and 424. All had been withdrawn by 1929.

Table of withdrawals
Year	Quantity in service at start of year	Quantity withdrawn	Locomotive numbers
1925	32	1	A346
1926	31	15	A40, A72, A73, A82, A135, A220, A237, A345, A352, A358, A360, A405, A417, A418, A422
1927	16	11	A6, A26, A136, A169, A235, A356, A399, A410, A414, A421, A424
1928	5	3	A23, A173, A401
1929	2	2	A349, A368

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References

Casserley & Johnston 1974, p. 42.

Bibliography

Ahrons, E.L. (1926). The British Steam Railway Locomotive. Ian Allan.
Casserley, H.C.; Johnston, S.W. (1974). Locomotives at the Grouping 1, Southern Railway. Ian Allan. ISBN 0-7110-0552-4.CS1 maint: ref=harv (link)

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[FOOTNOTECasserleyJohnston197442-1] Casserley & Johnston 1974, p. 42.