LMS Ivatt Class 2 2-6-0

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

LMS Ivatt Class 2 2-6-0
46403 on the Midland Main Line near Souldrop in 1955.
Type and origin
Power typeSteam
DesignerH. G. Ivatt
Builder
Build date1946–1953
Total produced128
Specifications
Configuration:
​
 • Whyte2-6-0
 • UIC1′C h2
Gauge4 ft 8 1⁄2 in (1,435 mm) standard gauge
Leading dia.3 ft 0 in (0.914 m)
Driver dia.5 ft 0 in (1.524 m)
Length53 ft 1 3⁄4 in (16.20 m)
Loco weight47.10 long tons (47.9 t; 52.8 short tons) (6400–64)
48.45 long tons (49.2 t) (remainder)
Tender weight37.15 long tons (37.7 t; 41.6 short tons)
Fuel typeCoal
Fuel capacity4 long tons (4.1 t; 4.5 short tons)
Water cap3,000 imp gal (14,000 l; 3,600 US gal)
Firebox:
 • Firegrate area		17 1⁄2 sq ft (1.63 m2)
BoilerLMS type 7
Boiler pressure200 lbf/in2 (1.38 MPa)
Heating surface:
 • Tubes		924 sq ft (85.8 m2)
 • Firebox101 sq ft (9.4 m2)
Superheater:
​
 • Heating area134 sq ft (12.4 m2) or
124 sq ft (11.5 m2)
CylindersTwo, outside
Cylinder size16 in × 24 in (406 mm × 610 mm)
Valve gearWalschaerts
Performance figures
Tractive effort17,410 lbf (77.44 kN)
Career
Operators
Power class
  • LMS: 2F
  • BR: 2MT
Numbers
  • LMS:6400–6419
  • BR: 46400–46527
NicknamesMickey Mouse
Axle load classBR: Route Availability 2
Withdrawn1961–1967
Disposition7 preserved, remainder scrapped

Design

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 Stanier Class 3 2-6-2T, which was inspired by the Fowler Class 3 2-6-2T. The 2-6-0s had greater range: 3,000 imperial gallons (14,000 l; 3,600 US gal) of water and 4 long tons (4.1 t; 4.5 short tons) of coal compared to the tank design's 1,350 imperial gallons (6,100 l; 1,620 US gal) and 3 long tons (3.05 t; 3.36 short tons). So they 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 nicknamed "Mickey Mouse".[1]

Construction

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 (13 mm) yielded a tractive effort of 18,510 lb (8,400 kg), 1,100 lb (500 kg) greater than the original design. The LMS classified them 2F, BR as 2MT.

Table of orders
Number Lot no. Date Built at
LMS BR
6400–09 46400–09 182 1946 Crewe
6410–19 46410–19 189 1947 Crewe
— 46420–34 194 1948 Crewe
— 46435–49 201 1950 Crewe
— 46450–59 207 1950 Crewe
— 46460–64 208 1950 Crewe
— 46465–82 1309 1951 Darlington
— 46483–94 1310 1951 Darlington
— 46495–502 1310 1952 Darlington
— 46503–14 394 1952 Swindon
— 46515–27 394 1953 Swindon

The 38 members of the Darlington-built batch (46465 to 46502) were allocated to the Eastern and North Eastern Regions of British Railways. The final 25 (46503 to 46527) were built at Swindon Works 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.

Withdrawal

The class was withdrawn between 1961 and 1967.

Table of withdrawals
YearQuantity in
service at
start of year		Quantity
withdrawn		Locomotive numbers
1961128146407.
19621271246408/15/53/66/69/71/76–78/81/93/95.
1963115446438/73/83/89.
1964111846403/09/35/61/67/74–75, 46525.
19651032146404/13/20/23/25/30/44/56/59/68/72/79/82/88/97–98, 46510–11/24/27.
1966824046401/05/10/12/14/16/19/21–22/24/26–29/34/42/45–47/50–51/54/58/60/62–64/95–96,
46504/08–09/12–14/17–19/21/26.
1967424246400/02/06/11/17–18/31–33/36–37/39–41/43/48–49/52/55/57/65/70/80/84–87/90–92/99,
46500–03/05–06/15–16/20/22–23.

Accidents & Incidents

On 27 April 2013, No. 46521 derailed on the trap points at Quorn and Woodhouse on the Great Central Railway following a misunderstanding between the signalman and the locomotive's crew. The derailment was captured on video by a visitor and subsequently posted on YouTube. Nobody was injured, and the locomotive was recovered via the use of a crane; it was then towed back to the shed by BR Class 45 No. D123.[2] Almost one month after the incident, the locomotive returned to service.[3]

Preservation

Seven of the class have been preserved but only six engines have run in preservation (46428 is undergoing restoration from scrapyard condition to working order at the East Lancs Railway). Three members of the class have also operated on the mainline in preservation: No's 46441, 46443 & 46521. Three of them were purchased from British Railways while the other four preserved examples were rescued from Barry Scrapyard throughout the 1970s. The ones rescued from Barry Scrapyard include No. 46428, No. 46447, No. 46512, and No. 46521. The ones sold into preservation include No. 46441, No. 46443, and No. 46464.

46443 Became a popular mainline engine in the 1980s when it was one of the engines used during the 150th anniversary of the Great Western Railway traveling along many old branchlines including the old Bristol Harbour Railway.

46521 Saw use on the mainline in the 1990s but only saw a limited amount of use hauling excursion trains with one of its runs being on the GWML in December 1994.

46441 Was one of the smallest tender engines to operate on the former BR system during the 90s. As well as being a regular at Carnforth and working at its home on the East Lancashire Railway it was also used for the regular steam on the met programme working trains alongside other steam engines. 46441 in recent years has been on static display inside the museum at the Ribble Steam Railway in Preston awaiting an overhaul. In April 2018 the engine was moved by road to its new home at the Lakeside and Haverthwaite Railway, it is presently the only tender engine based at the railway. The locos current owner Chris Beet who also owns LMS Jubilee no 45690 Leander is having the engine overhauled for use on the railway but it will not be returning to the mainline.

BR no Image Name* Builder Built Withdrawn Service Life Current Location Current Condition Livery Notes
46428 Crewe Works Dec 1948 Dec 1966 17 Years, 11 Months East Lancashire Railway Under Restoration N/A Being restored from condition as recovered from Woodham Brothers scrapyard, Barry, Vale of Glamorgan, South Wales.
46441 Crewe Works Feb 1950 Apr 1967 17 Years, 2 Months Lakeside and Haverthwaite Railway Under Overhaul BR Lined Crimson, Late Crest In non-authentic BR Maroon livery.
46443 Crewe Works Feb 1950 Mar 1967 17 Years, 28 Days Severn Valley Railway Static Display BR Lined Black, Late Crest Stored awaiting overhaul in The Engine House, Highley.
46447 Crewe Works Mar 1950 Dec 1966 16 Years, 9 Months East Somerset Railway Operational BR Lined Black, Late Crest Returned to operation October 2014. On loan from the Isle of Wight Steam Railway.
46464 The Carmyllie Pilot* Crewe Works Jun 1950 Sept 1966 16 Years, 3 Months Strathspey Railway Under Restoration N/A After preservation, hauled the first scheduled passenger train on the Strathspey Railway on 22 July 1978.[4] Currently being restored to working order. The name "Carmyllie Pilot" was used, during their working years, for both 46463 and 46464, both Dundee Tay Bridge (62B) allocated engines. Both locomotives took week about pilot duties at Arbroath station, and were often seen working the Carmyllie Railway branch line, either to the Metal Box factory or the Quarries at Carmyllie (see Carmyllie Railway). Local railway staff referred to either locomotive as The Carmyllie Pilot, dependent on which was on duty.
46512 E.V. Cooper, Engineer* Swindon Works Dec 1952 Dec 1966 13 Years, 11 Months Strathspey Railway Out of Service BR Lined Black, Early Emblem Boiler Ticket expired November 1st, 2020.
46521 Blossom* Swindon Works Mar 1953 Oct 1966 13 Years, 7 Months Great Central Railway Operational BR Lined Green, Early Emblem Returned to operation January 2012.

* Named in preservation

Only 46428 has yet to steam in preservation.

Models

Several 00 gauge ready-to-run models of the locomotive have been produced. In 1975, Hornby Railways produced a model of the class, in British Railways lined black (mixed traffic) livery. A BR lined green version followed in 1978. They were on sale until 1982.[5] In 2007 Bachmann Branchline introduced a more detailed model, available in several liveries including LMS unlined black, BR lined black and BR lined Brunswick Green, the latter livery of which was used for a model of now preserved 46521. Graham Farish produces several of the same liveries in N gauge. Comet Models produce an all-metal kit. In October 2020, Hornby announced an all-new ready-to-run model.[6]

In fiction

No. 46521 appeared in the sitcom Oh, Doctor Beeching! It was for this that it received the name 'Blossom'.[7]

Both 46443 and 46521 appeared in the 1976 Universal Pictures film The Seven-Per-Cent Solution. For this role both locomotives were heavily disguised to have a European flavour.[8]

Both "Oh, Doctor Beeching!" and "The Seven-Per-Cent Solution" were filmed on the Severn Valley Railway.[7][8]

References
  1. Hopkins, Simon (November 2007). "Bridgnorth's stalwart 'Mickey Mouse' is focus of charter". Steam Railway. 343: 24.
  2. Marsh, Phil. "Steam Locomotive totally derailed at The Great Central Railway". rail.co.uk. Retrieved 7 May 2013.
  3. Wilcock, Dennis. "46521 back in service". Great Central Railway. Retrieved 26 May 2013.
  4. 46464 Service in preservation
  5. Hammond, Pat (2005). The Story of Rovex Vol 3 1972-1996. London: New Cavendish Books. pp. 166–7. ISBN 1-904562-00-0.
  6. https://www.hornby.com/uk-en/news/the-engine-shed/all-that-glitters-is-gold?fbclid=IwAR3bWMeteO1gVJvumu1FSokPqqAGU-bdme7XTT1ZuklVLlZ7CBrM53boa3Q
  7. "Oh! Doctor Beeching Re-lives", Severn Valley Railway News issue 119, p. 33.
  8. "A Film in the Making", Severn Valley Railway News issue 38, p. 5.
  • Rowledge, J.W.P. (1975). Engines of the LMS built 1923–51. Oxford: Oxford Publishing Company. ISBN 0-902888-59-5.
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