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The reference for locomotives and railcars

London, Midland & Scottish No. 7080 to 7119

British Rail class D3/7

Great Britain 1939 40 produced
Works photo of LMS No. 7080 The Engineer, January 1940

The LMS numbers 7080 to 7119 were 40 three-axle diesel-electric shunters built between 1939 and 1942 at Derby. They are also known as later class D3/7. Like the earlier D3/6 and the later British three-axle shunters, they had their 350 hp diesel engine and their electric equipment from English Electric. But while the others had axle-hung traction motors, the D3/7 was powered by a single traction motor that worked on a jackshaft and coupling rods. Ten came to the war department of which six were later sold to Egypt and four to Italy. The rest was numbered starting with 12000 at British Railways, but their withdrawals in the late sixties prevented them from becoming TOPS class 12.

Technical data

General

Property 7080-7099 7100-7119
Built 1939-1942
Manufacturers Derby, English Electric
Wheel arrangement C
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property 7080-7099 7100-7119
Length 9.56 m
Wheelbase 4.65 m
Service mass 56.1 t 54.4 t
Adhesion mass 56.1 t 54.4 t
Rigid wheelbase 4.65 m
Axle load 18.7 t 18.1 t

Power plant

Property 7080-7099 7100-7119
Engine English Electric 6KT
Engine type 6-cyl. diesel

Power

Property 7080-7099 7100-7119
Power source diesel-electric
Indicated power 261 kW (355 PS)
Top speed 32 km/h
Starting effort 155.7 kN

Calculated values

Property 7080-7099 7100-7119
Factor of adhesion 1 : 3.54 1 : 3.43
Power-to-weight ratio 4.6 kW/t 4.8 kW/t
Adhesive weight/Total 1 : 1.00
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