LMS Ivatt Class 2 2-6-0

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LMS Ivatt Class 2 2-6-0

Preserved locomotive, no. 46443 at Bewdley railway station on 10th November 2007.
Power type	Steam
Designer	H. G. Ivatt
Builder	LMS & BR Crewe works BR Darlington Works BR Swindon Works
Build date	1946–1953
Total production	128
Configuration	2-6-0
UIC classification	1'Ch
Gauge	4 ft 8½ in (1,435 mm)
Leading wheel size	36 in (0.914 m)
Driver size	60 in (1.524 m)
Length	53 ft 1¾ in (16.20 m)
Locomotive weight	47.10 long tons (47.9 t) (6400–64) 48.45 long tons (49.2 t) (remainder) 37.15 long tons (37.7 t) (tender)
Fuel type	Coal
Fuel capacity	4 long tons (4.1 t)
Water capacity	3,000 imp gal (14,000 l)
Boiler	LMS type 7
Boiler pressure	200 psi (1.38 MPa)
Fire grate area	17.5 sq ft (1.63 m²)
Heating surface: Tubes	924 sq ft (85.8 m²)
Heating surface: Firebox	101 sq ft (9.4 m²)
Superheater area	134 sq ft (12.4 m²) or 124 sq ft (11.5 m²)
Cylinders	Two, outside
Cylinder size	16×24 in (406×610 mm)
Tractive effort	17,410 lbf (77.44 kN)
Class	LMS 2F BR: 2MT
Nicknames	Mickey Mouse
Retired	1961–1967

Preserved locomotive, no. 46443 on the Severn Valley Railway on 15th October 2004.

46521 at Machynlleth, 7 August 1965. This engine, one of those built at Swindon, has since been preserved.

46521 in preservation showing the green livery that Swindon-built engines 46503-27 carried, as well as the shape of the tender designed for good visibility when running backwards.

Also preserved is 46441, here seen in inauthentic BR maroon livery.

The London, Midland and Scottish Railway (LMS) Ivatt Class 2 2-6-0 is a class of steam locomotive designed for light mixed traffic.

[edit] Overview

Elderly 0-6-0s formed the backbone of the low-powered locomotives within the LMS fleet. William Stanier had concentrated on introducing larger engines and it was left to George Ivatt to introduce a new class of low-powered locomotive. He designed a tender version of the Ivatt Class 2 2-6-2T, introduced at the same time, which was inspired by the Great Western 4500 and 4575 classes. The 2-6-0s, with their greater range (3,000 gal of water and 4 tons of coal compared to the tank design's 1,350 gal and 3 tons), were well-suited to their task and, following attention to draughting problems by both Derby and Swindon, quickly became a success. Further engines of this type were built as the BR standard class 2 2-6-0, these locomotives having BR standard fittings and a modified cab and tender profile to allow completely unrestricted route availability; both LMS and BR 2MT moguls are often referred to by the affectionate nickname "Mickey Mouse"^[1].

A total of 128 were built between 1946 and 1953, mostly at Crewe. 20 were built by LMS and given the numbers 6400-19. On nationalisation in 1948 40000 was added to their numbers to become 46400-19. The remaining 108 locomotives of the class, numbered 46420-46527 were built by British Railways, and from 46465 (Darlington, 1951) an increase in cylinder diameter of 1/2 inch yielded a Tractive Effort of 18,510 lb, 1,100 lb greater than the original design. The LMS classified them 2F, BR as 2MT.

38 (46465 to 46502) were built at Darlington and allocated to the Eastern and North Eastern regions. The final 25 (46503 to 46527) were built at Swindon and, being allocated to the Western Region , consequently carried the GWR-type vacuum ejector and firehole doors. The Swindon locomotives were turned out, initially, in lined black. Under the Hanks regime, some received lined green livery as they passed through works. The rest carried black livery. None of the Class was named in service, however some have been named in preservation.

The class was withdrawn between 1961 and 1967.

[edit] Preservation

Seven have been preserved. These are 46428, 46441, 46443, 46447, 46464, 46512 and 46521. 46512 and 46521 were built at Swindon and 46521 carries the BR green livery. 46441 has been given an inauthentic livery of "what might have been" had the LMS not been nationalised; it has been renumbered 6441 and painted in LMS passenger crimson lake livery. Details in preservation are as follows:

* Named in preservation.

[edit] 00 Gauge Models

Hornby Railways produced a poor model of the class in BR Green and Black. Bachmann Branchline currently (2007) produce an excellent model in LMS Black, BR early Black and the preserved BR Green example. Comet Models produce an excellent, all-metal kit.

[edit] In fiction

No. 46521 appeared in the sitcom Oh, Doctor Beeching! It was for this that it received the name 'Blossom'

[edit] External links

• The Carmyllie Pilot Company Limited (owners of 46464)
• Loughborough Standard locomotive Group (owners of 46521)

[edit] References

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