LT&SR 79 Class

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LT&SR 79 class
Bressingham Steam Museum and Gardens 15.jpg
Preserved LTSR 4-4-2T No. 80 Thundersley
Type and origin
Power typeSteam
Designer Thomas Whitelegg
Builder
Serial number
  • RS 3366–3369,
  • NW 1448–1452
Build date1909–1930
Total produced39
Specifications
Configuration:
   Whyte 4-4-2T
   UIC 2′B1 t
Gauge 4 ft 8+12 in (1,435 mm)
Leading dia. 3 ft 6 in (1.067 m)
Driver dia.6 ft 6 in (1.981 m)
Trailing dia. 3 ft 6 in (1.067 m)
Wheelbase 30 ft 9+12 in (9.39 m)
Length39 ft 0 in (11.89 m)
Loco weight71.50 long tons (72.65 t)
Fuel type Coal
Fuel capacity2.75 long tons (2.79 t)
Water cap.1,800 imp gal (8,200 L; 2,200 US gal)
Boiler pressure170 psi (1.17 MPa)
Cylinders Two, outside
Cylinder size 19 in × 26 in (483 mm × 660 mm)
Valve gear Stephenson
Performance figures
Tractive effort 17,390 lbf (77.4 kN)
Career
Operators
Power classMR/LMS/BR: 3P
Number in class1 January 1923: 4
1 January 1948: 39
Locale London Midland Region
Withdrawn1951–1960
DispositionOne preserved, remainder scrapped

The London, Tilbury and Southend Railway (LTSR) 79 Class is a class of 4-4-2T suburban tank engines. They were designed by Thomas Whitelegg, as a development of the earlier 37 Class. They could reach a top speed of 65 mph (105 km/h). [1]

Contents

The four locomotives ordered by the LTSR were numbered 79–82 and were named after places in Essex, near the LTSR route. After absorption by the Midland Railway in 1912, they were renumbered 2176–2179 and their names were removed. The Midland gave them the power classification 3P, and later continued construction; an order for 10 locomotives was delivered in 1923, just after grouping.

List of LTSR locomotives

LTSR
No.
LTSR NameBuilderBuiltMR
No.
LMS 1923
No.
LMS 1930
No.
BR
No.
Withdrawn
79RipplesideRS 33661909217621762147419651951
80 Thundersley RS 33671909217721772148419661956
81 Aveley RS 33681909217821782149419671952
82CrowstoneRS 33691909217921792150419681951

Additional orders

In addition to those constructed by the LTSR and MR, 35 were delivered to the London, Midland and Scottish Railway (LMS) – ten in 1923, five in 1925, ten in 1927, and a final 10 in 1930. The ten delivered in 1923 were to an outstanding order placed by the MR, the remainder were ordered by the LMS. [2] The five delivered in 1925 were built by Nasmyth, Wilson and Company, with the other thirty built by the LMS's Derby Works. In 1947 the LMS assigned them the numbers 1928–1975, to clear their previous numbers for new LMS Fairburn 2-6-4T locomotives, but none of these was applied before nationalisation in 1948, leaving British Railways to apply the numbers 41928–41975.

LMS Lot No.BuiltBuilderLMS No.BR No.Withdrawn
Lot 51923Derby Works2110–211941928–419371951–1959
Lot 241925NW 1448–14522120–212441938–413421952–1959
Lot 481927Derby Works2125–213441943–419521956–1960
Lot 701930Derby Works2151–216041969–419781955–1959

They were later displaced from the London, Tilbury and Southend Railway and found work on ex-Midland lines in the East Midlands.

Preservation

One, 80 Thundersley has been preserved and is on static display at the Bressingham Steam Museum in Norfolk.

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References

  1. Train: The Definitive Visual History. DK Publishing. 2014. p. 97. ISBN   978-1465436580 . Retrieved 2 October 2020.
  2. Cook, A.F. (1990). Greenwood, William (ed.). LMS Locomotive Design and Construction. Lincoln: RCTS. pp. 58–61, 63, 67. ISBN   0-901115-71-1.