British Rail Class 48

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Brush Type 4
British Rail Class 48
47117 Weymouth 1989.jpg
Former Class 48, No.47117, at Weymouth station in 1989
Type and origin
Power typeDiesel-electric
Builder Brush Traction, Falcon Works
Build date1965–1966
Total produced5
Specifications
Configuration:
   UIC Co'Co'
  Commonwealth Co-Co
Wheel diameter3 ft 9 in (1.143 m)
Wheelbase 51 ft 6 in (15.70 m)
Length63 ft 6 in (19.35 m)
Width8 ft 10 in (2.69 m)
Height12 ft 9+38 in (3.90 m)
Loco weight112 long tons (114 t; 125 short tons)
Prime mover Sulzer 12LVA24
MU working Not fitted
Train heating Steam generator
Train brakes Vacuum
Performance figures
Maximum speed95 mph (153 km/h)
Power outputEngine: 2,650  bhp (1,976 kW)
Brakeforce60 long tons-force (598  kN)
Career
Operators British Rail
NumbersD1702–D1706
Axle load class Route availability 7 (RA 6 from 1969)
DispositionRe-engined to Class 47, 1969–1971

The British Rail Class 48 was a diesel locomotive class which consisted of five examples, built at Brush Falcon Works in Loughborough and delivered between September 1965 and July 1966. [1] They were part of the British Rail Class 47 order, but differed from their classmates by being fitted with a Sulzer V12 12LVA24 power unit producing 2,650  bhp (1,976 kW), as opposed to the standard 12LDA28C twin-bank twelve-cylinder unit of the remaining fleet.

Contents

In service

The locomotives, numbered in the D1702-D1706 series, [2] mainly worked from Tinsley depot in Sheffield on both passenger and freight work. In 1969, they moved to Norwich depot where they worked on express trains between there and London Liverpool Street. [1] The 12LVA24 engine, however, was found to be unreliable and the locomotives spent more time out of service than their standard counterparts. Engine failures were common and repairs were often expensive. [1] After conversion to Class 47s, they moved to Stratford depot, in East London, until they were displaced by examples fitted with electric train heating equipment. Subsequently, the batch went their separate ways to several depots.

Rebuilding

Eventually, it was decided not to continue with the 12LVA24 experiment; the engines were removed and the locomotives were fitted with the standard 12LDA28 engines. D1702 was the first to be so treated at Crewe Works, using parts from D1908 which had been withdrawn after a serious accident; it emerged back into service in December 1969. All five locomotives had been so converted by early 1971 and then became standard Class 47s. The power units were sold to SNCF and used in their Class A1AA1A 68000 locomotives. [3]

Further service and preservation

D1705 as preserved on the Great Central Railway. D1705 near Quorn.jpg
D1705 as preserved on the Great Central Railway.

The locomotives continued in service for many years afterwards and were renumbered 47114-47118 to conform with British Rail's TOPS system in the early 1970s. Four of the locomotives were withdrawn from service between December 1990 and January 1991 with the remaining locomotive, 47 114, being sidelined in 2002. Engine 47 117 (D1705) was subsequently bought for preservation by rail enthusiast and pop music producer Pete Waterman. It is now owned by the Type 1 Locomotive Association and works on the private Great Central Railway. [4] At the GCR, it has been restored to BR two-tone green livery with its pre-TOPS number D1705, though it retains its Class 47 engine. It has also been named Sparrowhawk in the tradition of Brush Works policy of naming locomotives after birds of prey (qv Kestrel, Falcon, etc.), though it never carried this name in service. The other four locomotives have since been scrapped.

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References

  1. 1 2 3 Engineer's notes Derbysulzers.com - Retrieved on 2007-11-25
  2. Toms 1978 , p. 66
  3. Garvin, Brian; Fox, Peter; Appleby, Chris (1986). SNCF/French National Railways. Sheffield: Platform Five. p. 51. ISBN   0-906579-62-7.
  4. D1705 at the GCR Archived 8 June 2007 at the Wayback Machine - Retrieved on 2007-11-25

Sources