British Rail Class D3/7

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).

British Rail Class D3/7
Type and origin Power type Diesel-electric Builder London, Midland and Scottish Railway’s Derby Works Build date 1939–1942 Total produced 40
Specifications Configuration: ​  • Whyte 0-6-0 DE  • UIC C Gauge 4 ft 8 1⁄2 in (1,435 mm) Wheel diameter 4 ft 3 in (1.295 m) Loco weight 7080–7099: 55.25 long tons (56.14 t), 7100–7119: 53.50 long tons (54.36 t) Prime mover English Electric 6K Traction motors English Electric, 1 off Train heating None
Performance figures Top speed 20 mph (32 km/h) Power output Engine: 350 bhp (261 kW) Tractive effort 33,000 lbf (146.8 kN)
Career Railroad(s) London, Midland and Scottish Railway, British Railways Class LMS: 0F, BR: D3/7; later 3/8 and 3/8B Number LMS:7080–7119; BR: 12003–12032 Axle load class 7080–7099: RA 7, 7110–7119: RA 6 Retired 1964(1), 1966–1967