GER Class S69

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GER Class S69
LNER Class B12
Keith (ex-GN of S) Locomotive Depot geograph-2844974-by-Ben-Brooksbank.jpg
B12/4 4-6-0 No. 61504 at Keith Locomotive Depot 1948
Specifications
Power type Steam
Designer S. D. Holden
Builder GER Stratford Works (51),
Wm. Beardmore & Co. (20),
Beyer, Peacock & Co. (10)
Serial number WB 135–154,
BP 6487–6496
Build date 1911–1928
Total produced 81
Configuration 4-6-0
UIC classification 2′C h2t
Gauge 4 ft 8 12 in (1,435 mm)
Leading wheel
diameter
3 ft 3 in (0.991 m)
Driver diameter 6 ft 6 in (1.981 m)
Wheelbase 48 ft 3 in (14.71 m)
Length 57 ft 7 in (17.55 m) over buffers
Weight on drivers B12/1&2: 43 tons 8 cwt (97,200 lb or 44.1 t)
B12/3: 48 tons 2 cwt (107,700 lb or 48.9 t)
Locomotive weight B12/1&2: 62 tons 19.5 cwt (141,100 lb or 64.0 t)
B12/3: 69 tons 5 cwt (155,100 lb or 70.4 t)
Tender weight 38 tons 6 cwt (85,800 lb or 38.9 t)
Fuel type Coal
Fuel capacity 4 tons 0 cwt (9,000 lb or 4.1 t)
Water capacity 3,700 imp gal (16,800 l; 4,440 US gal)
Boiler pressure 180 psi (1.24 MPa)
Firegrate area 26.5 sq ft (2.46 m2)
Heating surface:
– Firebox
154 sq ft (14.3 m2)
– Total 1,919 sq ft (178.3 m2)
Cylinders Two, inside
Cylinder size 20 in × 28 in (510 mm × 710 mm)
Tractive effort 21,969 lbf (97.72 kN)
Career
Railroad(s) GER · LNER · BR
Class GER: S69,
LNER: B12
Power class BR: 4P3F
Axle load class LNER/BR: RA 4
Withdrawn 1913 (1), 1945–1961
Disposition One preserved, remainder scrapped

Great Eastern Railway (GER) Class S69, also known as 1500 Class, and later classified B12 by the LNER is a class of 4-6-0 steam locomotive designed to haul express passenger trains from London Liverpool Street station along the Great Eastern Main Line.[1] Originally they were designed by S. D. Holden, but were much rebuilt, resulting in several subclasses.

Seventy-one S69 locomotives were built by the GER between 1911 and 1921 and numbered 1500–1570. A further 10 locomotives were built by Beyer, Peacock & Co for the LNER in 1928 and numbered 8571-8580.[2] From 1948 the British Railways numbers were 61500–61580 (with gaps).

Background[edit]

At the time of their introduction, the "Claud Hamilton" 4-4-0s were becoming outclassed on the heaviest express. Although an enlarged 4-4-0 design was mooted,[3] it was realised that any such design would have too high an axle load for the tracks of the Great Eastern Railway, which had a relatively low restriction. Another design constraint was the short turntables used at the time. This meant that a 4-6-0 design was decided upon, although the design was relatively short compared to similar designs introduced at the same time.

Table of orders and numbers[4]
Year Order Manufacturer Quantity GER Nos. LNER Nos. LNER 1944 Nos. Notes
1911–12 S69 Stratford Works 5 1500–1504 8500–8504 1500–1504
1913 A73 Stratford Works 10 1505–1514 8505, —, 8507–8514 1505, —, 1507–1514 1506 withdrawn after accident at Colchester, 12 July 1913
1913 E75 Stratford Works 5 1515–1519 8515–8519 1515–1519
1914 R75 Stratford Works 10 1520–1529 8520–8529 1520–1529
1914–15 M77 Stratford Works 6 1530–1535 8530–8535 1530–1535
1915–17 B78 Stratford Works 5 1536–1540 8536–8540 1536–1540
1920–21 Wm. Beardmore & Co. 135–154 20 1541–1560 8541–8560 1541–1560
1920 H82 Stratford Works 10 1561–1570 8561–8570 1561–1570
1928 Beyer, Peacock & Co. 6487–6496 10 8571–8580 1571–1580

Sub-classes[edit]

B12/3 No. 61580 at Grantham 28 March 1956.
  • B12/1 Introduced 1911, GER locos with 5-foot-1 18-inch (1,553 mm) diameter boiler and Belpaire firebox.
  • B12/2 Introduced 1926, locos fitted with Lentz poppet valves: ten 1928-built LNER locomotives and six rebuilt GER locomotives: 8516/19/25/32/33/40. [5]
  • B12/3 Introduced 1932, LNER rebuild of B12/1 with 5-foot-6-inch (1,676 mm) diameter boiler and round-topped firebox (Diagram 99A).[5]
  • B12/4 Introduced 1943, LNER rebuild of B12/1 with 5-foot-1 18-inch (1,553 mm) diameter boiler and round-topped firebox (Diagram 25A) for Scottish lines with limited axle-load – Comprised nine locomotives: 1500/04/05/07/08/11/24/26/32.[5]

The poppet valves were not a great success and all the B12/2s were converted to piston valve engines between 1931 and 1934.

Accidents and incidents[edit]

  • On 12 July 1913, locomotive No. 1506 was hauling an express passenger train which collided with a light engine at Colchester, Essex due to a signalman's error. Three people were killed and fourteen were injured. The brand new locomotive was so severely damaged that only its boiler was salvaged.[6]
  • On 10 February 1941, locomotive No. 8556 was hauling a passenger train that overran signals and was in a rear-end collision between Harold Wood and Brentwood, Essex. Seven people were killed and seventeen were seriously injured.[7]
  • On 2 January 1947, locomotive No. 1565 was hauling a passenger train that was run into by an express passenger train at Gidea Park, Essex. The express had overrun signals. Seven people were killed, 45 were hospitalised.[8]

Preservation[edit]

One B12/3, LNER number 8572 (BR 61572), has survived to preservation on the North Norfolk Railway, the only British inside cylinder 4-6-0 to be preserved.

References[edit]

Notes[edit]

  1. ^ Phillips 1982, p. 3
  2. ^ "S69 Class 4-6-0 1911-1921, 1928". Great Eastern Railway Society. Retrieved 2008-04-16. 
  3. ^ Hughes 1988, p. 56
  4. ^ Aldrich 1969, p. 55
  5. ^ a b c Boddy et al. 1975, pp. 65–66.
  6. ^ Trevena 1981, p. 25
  7. ^ Earnshaw 1991, p. 28
  8. ^ Earnshaw 1991, p. 30

Bibliography[edit]

  • Aldrich, C. Langley (1969). The Locomotives of the Great Eastern Railway 1862–1962 (7th ed.). Wickford, Essex: C. Langley Aldrich. OCLC 30278831. 
  • Boddy, M. G.; Brown, W. A.; Fry, E. V.; Hennigan, W.; Hoole, Ken; Manners, F.; Neve, E.; Platt, E. N. T.; Proud, P.; Yeadon, W. B. (March 1975). Fry, E. V., ed. Locomotives of the L.N.E.R., Part 2B: Tender Engines—Classes B1 to B19. Lincoln: RCTS. ISBN 0-901115-73-8. 
  • Earnshaw, Alan (1991). Trains in Trouble: Vol. 7. Penryn: Atlantic Books. ISBN 0-906899-50-8. 
  • Hughes, Geoffery (1988). LNER 4-6-0s At Work. Book Law Publications. ISBN 1-901945-06-5. 
  • Phillips, Charles (1982). Essex Steam. King's Lynn: Becknell Books. ISBN 0-907087-10-8. 
  • Trevena, Arthur (1981). Trains in Trouble: Vol. 2. Redruth: Atlantic Books. ISBN 0-906899-03-6. 

External links[edit]