BNCR Class S

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Power typeSteam
Power typeSteam
DesignerS. Rendall
BuilderBeyer, Peacock & Company, Manchester & MR (NCC), York Road works, Belfast
BNCR Class S
Nº 110
Type and origin
Power typeSteam
DesignerS. Rendall
BuilderBeyer, Peacock & Company, Manchester & MR (NCC), York Road works, Belfast
Build date1892–1920
Total produced6
Specifications
Configuration:
  Whyte2-4-2T
Gauge3 ft (914 mm)
Leading dia.2 ft 0 in (610 mm)
Driver dia.3 ft 9 in (1,143 mm)
Trailing dia.2 ft 0 in (610 mm)
Wheelbase20 ft 3 in (6.17 m)
Length27 ft 9+78 in (8.48 m)
Width7 ft 4 in (2.24 m)
Height9 ft 8 in (2.95 m)
Adhesive weight10 long tons (10.2 t; 11.2 short tons) + 10 long tons (10.2 t; 11.2 short tons)
Loco weight31.85 long tons (32.36 t; 35.67 short tons)
Fuel typeCoal
Fuel capacity1 long ton (1.0 t; 1.1 short tons)
Water cap.570 imperial gallons (2,600 L; 680 US gal)
Boiler pressure160 psi (1.1 MPa)
Heating surface:
  Firebox58.2 sq ft (5.41 m2)
  Tubes614.8 sq ft (57.12 m2)
  Total surface673 sq ft (62.5 m2)
CylindersTwo
High-pressure cylinderLHS: 14+34 in × 20 in (375 mm × 508 mm)
Low-pressure cylinderRHS: 21 in × 20 in (533 mm × 508 mm)
Valve gearWalschaerts
Loco brakeSteam
Train brakesAutomatic vacuum
Performance figures
Tractive effort13,150 lbf (58.49 kN)
Career
Operators
Scrapped1938–55

The Belfast and Northern Counties Railway (BNCR) Class S was a class of 2-4-2T two-cylinder compound steam locomotives that was introduced for service on the 3 ft (914 mm) narrow gauge railways of County Antrim in north-east Ireland.

The Class S was a class of six locomotives designed under the supervision of Bowman Malcolm as a narrow gauge application of the Worsdell-von Borries system of two-cylinder compound locomotives that had been adopted by the Northern Counties Committee (BNCR). Limited space between the frames required them to have outside cylinders and Walschaerts valve gear unlike their 5 ft 3 in (1,600 mm) broad gauge counterparts. The smaller diameter high-pressure cylinder was on the left and the larger low-pressure one on the right.

Two engines were ordered from Beyer, Peacock & Company in January 1892 and left Manchester in May 1892 entering service as numbers 69 and 70. They were renumbered 110 and 111 respectively in 1897. The class would only be enlarged after the BNCR had amalgamated with the Midland Railway to become the Northern Counties Committee (NCC).

The next engines were built by the NCC at York Road works to transport valuable iron ore traffic, that had been obtained in 1907, from the mines at Parkmore to Larne Harbour via Ballymena. Two engines entered service as No.112 in October 1908 and No.113 in March 1909. They were renumbered 102 and 101 respectively in 1920.

The last two members of the class were Nos.103 and 104. Outshopped from York Road in September 1919 and March 1920 respectively, they were the last von Borries compounds to be built.

Built for service on the Ballymena & Larne and Cushendall lines of the BNCR, various members of the class were transferred to the Ballycastle Railway following that line's amalgamation with the NCC in 1924.

Nos.101 and 102 were rebuilt in 1930 and 1928 respectively with a coal bunker at the rear to reduce the need to store coal inside the cab and had the trailing radial truck extended accordingly; these were reclassified as Class S1. No.110 was heavily rebuilt in 1931 as a 2-4-4T with a standard gauge boiler and reclassified as Class S2.

Of the three unaltered Class S, 103 had the shortest existence and at the end of 1938 it was scrapped after being out of use for two years.

111 (ex-70) was renumbered a second time in December 1948, becoming No.44. Having spent her latter years on the Ballycastle line it accumulated a total of more than one million miles (1,600,000 km) before being withdrawn after 58 years of service. No.44 was scrapped in February 1954.

104 was shedded at Ballymena for many years and was renumbered No.43 in October 1943. Four years later it received a heavy repair and was transferred to the Ballycastle line where it worked until the line closed in 1950. No.43 remained in stock until 1954 when it was scrapped.

Technical details

Livery

References

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