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British Rail class 42

D829 Magpie in October 1961 with an express train bound for Plymouth at London-Paddington

For the mountainous routes in Devon and Cornwall, the Western Region decided to purchase lighter diesel-hydraulic locomotives. Since Germany was the leader in this area, the technology of the V 200 of the Bundesbahn w...

British Rail class 42Remove
Variant
production
Built 1958-1961
Manufacturers Swindon
Wheel arrangement BB
Gauge 1435 mm
Length 18288 mm
Service mass 79252 kg
Top speed 145 km/h
Power
Engine Bristol Siddeley (Maybach) MD650

General

Property British Rail class 42
production
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Built 1958-1961
Manufacturers Swindon
Wheel arrangement B-B
Gauge 1,435 mm

Dimensions and weights

Property British Rail class 42
production
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Length 18.29 m
Wheelbase 14.71 m
Service mass 79.3 t
Adhesion mass 79.3 t
Axle load 19.8 t

Power plant

Property British Rail class 42
production
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Engine Bristol Siddeley (Maybach) MD650
Engine type 2x V12 diesel

Power

Property British Rail class 42
production
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Power source diesel-hydraulic
Indicated power 1,693 kW (2,302 PS)
Top speed 145 km/h
Starting effort 214.4 kN

Calculated values

Property British Rail class 42
production
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Factor of adhesion 1 : 3.63
Power-to-weight ratio 21.4 kW/t
Adhesive weight/Total 1 : 1.00
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