LMS 3-Cylindered Stanier 2-6-4T

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LMS Stanier Class 4P 3-cylinder 2-6-4T
Stratford with Stanier 3-cylinder 2-6-4T geograph-2813264-by-Ben-Brooksbank.jpg
42504 at Stratford, November 1961
Type and origin
Power typeSteam
DesignerWilliam Stanier
BuilderLMS Derby Works
Build date1934
Total produced37
Specifications
Configuration:
 • Whyte2-6-4T
 • UIC1′C2′ h3tb
Gauge4 ft 8 12 in (1,435 mm) standard gauge
Leading dia.3 ft 3 12 in (1.003 m)
Driver dia.5 ft 9 in (1.753 m)
Trailing dia.3 ft 3 12 in (1.003 m)
Wheelbase38 ft 6 in (11.73 m)
Length47 ft 2 34 in (14.40 m)
Width8 ft 11 12 in (2.73 m)
Height12 ft 10 12 in (3.92 m)
Loco weight92.25 long tons (93.73 t; 103.32 short tons)
Fuel typeCoal
Fuel capacity3.50 long tons (3.56 t; 3.92 short tons)
Water cap2,000 imp gal (9,100 l; 2,400 US gal)
Firebox:
 • Firegrate area
25 sq ft (2.3 m2)
BoilerLMS type 4C
Boiler pressure200 lbf/in2 (1.4 MPa)
Heating surface:
 • Tubes and flues
1,011 sq ft (93.9 m2)
 • Firebox137 sq ft (12.7 m2)
Superheater:
 • Heating area160 to 154 sq ft (14.9 to 14.3 m2)
CylindersThree
Cylinder size16 in × 26 in (406 mm × 660 mm)
Performance figures
Tractive effort24,598 lbf (109.42 kN)
Career
Operators
Power class
  • LMS: 4P
  • BR: 4MT
Numbers
  • LMS 2500–2536
  • BR 42500–42536
Withdrawn1960–1962
DispositionOne preserved, remainder scrapped

LMS Stanier Class 4P 3-Cylinder 2-6-4T is a class of steam locomotive designed for work over the London, Tilbury and Southend Railway route. All 37 were built in 1934 at Derby Works and were numbered 2500–2536; the third cylinder was provided to allow increased acceleration between the many stops on the L.T.&S.R. line. From 1935 the LMS switched to constructing a very similar, simpler, 2-cylinder design. In 1941 two of the class had just been released from overhaul from Derby Works at the same time as a Jubilee class 4-6-0 failed in Derby station; the two tanks took over and got the train into St Pancras only 25 minutes late.[citation needed]

Production[edit]

No. 2500 was the first of the 37 express passenger tank locomotives designed specifically for the London Tilbury and Southend line of the London Midland & Scottish railway (LMS) as they were too powerful for mixed-traffic work.[citation needed] The inside cylinder and valve gear created additional maintenance and was deemed excessive for other duties; the locomotives were built in 1934 at LMS Derby Works.

Table of orders
numbers Lot No. date built Built at
LMS BR
2500–04 42500–04 102 1934 Derby
2505–36 42505–36 116 1934 Derby

Withdrawal[edit]

The class were withdrawn from 1960 to 1962.

Table of withdrawals
Year Quantity in
service at
start of year
Quantity
withdrawn
Locomotive numbers
1960 37 1 42512.
1961 36 7 42506/07/10/21/24/31/34.
1962 29 29 42500–05/08/09/11/13–20/22/23/25–30/32/33/35/36.

Preservation[edit]

LMS 2500 displayed at the National Railway Museum, York, April 2013

No. 2500 has survived and is on display at the National Railway Museum's Shildon Locomotion Museum. It is the sole survivor of this class and is painted in LMS lined black livery.

In fiction[edit]

References[edit]

  • Rowledge, J.W.P. (1975). Engines of the LMS built 1923–51. Oxford: Oxford Publishing Company. ISBN 0-902888-59-5.

External links[edit]