British Rail Class D3/7

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British Rail Class D3/7
Type and origin
Power typeDiesel-electric
BuilderLondon, Midland and Scottish Railway’s Derby Works
Build date1939–1942
Total produced40
Specifications
Configuration:
 • Whyte0-6-0 DE
 • UICC
Gauge4 ft 8 12 in (1,435 mm)
Wheel diameter4 ft 3 in (1.295 m)
Loco weight7080–7099: 55.25 long tons (56.14 t),
7100–7119: 53.50 long tons (54.36 t)
Prime moverEnglish Electric 6K
Traction motorsEnglish Electric, 1 off
Train heatingNone
Performance figures
Top speed20 mph (32 km/h)
Power outputEngine: 350 bhp (261 kW)
Tractive effort33,000 lbf (146.8 kN)
Career
Railroad(s)London, Midland and Scottish Railway,
British Railways
ClassLMS: 0F, BR: D3/7; later 3/8 and 3/8B
NumberLMS:7080–7119;
BR: 12003–12032
Axle load class7080–7099: RA 7,
7110–7119: RA 6
Retired1964(1), 1966–1967

British Railways Class D3/7 were diesel shunters built from May 1939 through to July 1942 by the London, Midland and Scottish Railway at their Derby Works. Like the earlier British Rail Class D3/6, they had the English Electric 6K diesel engine of 350 horsepower (260 kW). But a big change was having a "Jackshaft" type of connection between engine and wheels (like a diesel mechanical shunter). These were given LMS numbers 7080–7119. Ten were loaned to the War Department in 1941, and sold to the WD the following year. All ten survived the war; six were then sold to Egyptian Railways and four to Italian State Railways (Ferrovie dello Stato—FS).