GER Class D81

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GER Class D81
LNER Class J20
March 2 Locomotive Depot geograph-2353372-by-Ben-Brooksbank.jpg
J20 No. 4697 rests along with numerous other freight engines at March Locomotive Depot on Sunday 14 July 1946
Specifications
Power type Steam
Designer A. J. Hill
Builder Stratford Works
Total produced 25
Configuration 0-6-0
UIC classification C h2
Gauge 4 ft 8 12 in (1,435 mm)
Driver diameter 4 ft 11 in (1.499 m)
Wheelbase 40 ft 11 in (12.47 m)
Length 54 ft 6 in (16.61 m) over buffers
Locomotive weight 54 tons 15 cwt (122,600 lb or 55.6 t)
Fuel type Coal
Boiler pressure 180 lbf/in2 (1.24 MPa)
Firegrate area 26.5 sq ft (2.46 m2)
Heating surface:
– Total
1,834.2 sq ft (170.40 m2)
Cylinders Two, inside
Cylinder size 20 in × 28 in (508 mm × 711 mm)
Tractive effort 29,044 lbf (129.19 kN)
Career
Operator(s)
Class
  • GER: D81
  • LNER: J20
Power class BR: 5F
Axle load class LNER/BR: RA 5
Withdrawn 1959–1962

The GER Class D81 was a class of twenty-five 0-6-0 steam locomotives designed by A. J. Hill for the Great Eastern Railway. The all passed to the London and North Eastern Railway at the 1923 grouping and received the classification J20.

History[edit]

These locomotives were fitted with 20-by-28-inch (508 mm × 711 mm) cylinders and 4-foot-11-inch (1.499 m) wheels, while the Belpaire firebox-fitted boiler was identical to that fitted to the Class S69 4-6-0s. They were the most powerful 0-6-0 tender locomotive in Britain until the arrival of O. V. S. Bulleid's Q1 class for the Southern Railway in 1942.[1]

LNER ownership[edit]

All were still in service at the 1923 grouping, the LNER adding 7000 to the numbers of nearly all the ex-Great Eastern locomotives, including the Class D81 locomotives. The LNER rebuilt the class with round-top fireboxes, and reclassified them J20/1.[1]

BR ownership[edit]

At nationalisation in 1948, British Railways added 60000 to their LNER numbers. They all continued in service until 1959, when the first was withdrawn; all were gone by the end of 1962.[1]

Table of orders and numbers[edit]

Table of orders and numbers[1]
Year Order Manufacturer Quantity GER Nos. LNER Nos. 1946 Nos. Notes
1920 D81 Stratford Works 5 1270–1274 8270–8274 4675–4679
1922 M87 Stratford Works 10 1275–1284 8275–8284 4680–4689
1922 Y87 Stratford Works 10 1285–1294 8285–8294 4690–4699

References[edit]

  1. ^ a b c d Aldrich 1969, p. 73
  • Aldrich, C. Langley (1969). The Locomotives of the Great Eastern Railway 1862–1962 (7th ed.). Wickford, Essex: C. Langley Aldrich. OCLC 30278831. 

External links[edit]