The reference for locomotives and railcars
British Rail class 52
originally D1000
Great Britain | 1961 | 74 produced
D1051 “Western Ambassador” in April 1976 at Reading
D1051 “Western Ambassador” in April 1976 at Reading
Barry Lewis

After the Western Region had already ordered diesel-hydraulic locomotives, unlike the rest of the country, a more powerful locomotive was needed. This led to the production of 74 twin-engine machines with a total of 2,700 hp. With a top speed of 90 mph they occasionally reached 100 mph. They were given numbers from D1000 and are better known today under their later TOPS class 52. Like the other British diesel hydraulic locos they did not have one long life, so most were retired by 1976. As a result, none of them received the new number plate with the TOPS class.

ManufacturerSwindon, Crewe
Axle configC-C 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length68 ft 0 in
Wheelbase54 ft 8 in
Service weight241,920 lbs
Adhesive weight241,920 lbs
Axle load40,320 lbs
Power sourcediesel-hydraulic
Top speed90 mph
Starting effort66,700 lbf
EngineMaybach MD655
Engine type2x V12 diesel
Fuel1,021 us gal (diesel)
Engine output2,700 hp (2,013 kW)
Power Plant
Calculated Values
diesel locomotive
last changed: 04/2023

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