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British Rail Class 43 (HST)

For the British Rail High Speed Train as a whole, see InterCity 125. For the earlier Class 43 diesel-hydraulic locomotives, see British Rail Class 43 (Warship Class).

British Rail Class 43 (HST)
Power car 43002 Sir Kenneth Grange in May 2016
Type and origin
Power typeDiesel-electric
BuilderBritish Rail Engineering Limited Crewe Works
Build date1975–1982
Total produced197
Specifications
Configuration:
​
 • UICBo′Bo′
 • CommonwealthBo-Bo
Gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge
BogiesBP10
Wheel diameter3 ft 4 in (1.016 m)
Length17.79 metres (58.4 ft)
Width2.74 metres (9.0 ft)
Loco weight70.25 tonnes (69.14 long tons; 77.44 short tons)
Fuel capacity990 imp gal (4,500 L; 1,190 US gal)
Prime moverPaxman VP185
MTU 16V4000 R41R
Paxman Valenta 12RP200L
AlternatorValenta, VP185: Brush Traction BA1001B
MTU: Brush Traction BA1001C
Traction motorsGEC G417AZ (43124-43152)
Brush Traction TMH68-46
Both frame mounted, four off.
TransmissionEngine driven alternator and rectifier supplying DC to traction motors
MU workingWithin class only
Train heatingElectric Train Heat
Train brakesAir
Safety systems
Performance figures
Maximum speedService: 125 mph (201 km/h)
Record: 148 mph (238 km/h)
Power outputEngine: 2,250 hp (1,678 kW)
At rail: 1,770 bhp (1,320 kW)
Tractive effortMaximum: 17,980 lbf (80.0 kN)
Continuous: 10,340 lbf (46.0 kN)
Brakeforce35 long tons-force (349 kN)
Career
Operators
Current:
Future:
Previous:
Numbers43002–43198
Axle load classRoute Availability 5

The British Rail Class 43 (HST) is the TOPS classification used for the InterCity 125 High Speed Train (formerly Classes 253 and 254) diesel-electric power cars, built by British Rail Engineering Limited from 1975 to 1982, and in service in the UK since 1976.

The class is officially the fastest diesel locomotive in the world, with an absolute maximum speed of 148.5 mph (239.0 km/h), and a regular service speed of 125 mph (201 km/h). The record run was led by 43102 (43302) and trailed by 43159.[3][4]

  1. ^ Clinnick, Richard (April 2023). "Modernising the Moorgate branch". Rail Express. No. 323. Horncastle: Mortons Media Group. p. 87. ISSN 1362-234X. New Measurement Train [HST] power cars Nos. 43013/014/062 have visited the [RIDC] at Old Dalby for 'first in class' testing...
  2. ^ "Refurbished and repainted HSTs find new home in Nigeria". Network News. Rail Magazine. No. 1007. 17 April 2024. p. 16.
  3. ^ "FROM THE ARCHIVES: "Everybody is sad to see them go"". RAIL. Archived from the original on 1 July 2019. Retrieved 1 July 2019.
  4. ^ "HST Diesel Train World Speed Record - Art Print". 125 Group. Archived from the original on 1 July 2019. Retrieved 1 July 2019.


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