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Specifications
Specifications
Configuration:;
• Whyte	0-6-0 DE
• UIC	C
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Wheel diameter	4 ft 0+1⁄2 in (1.232 m)
Loco weight	51.45 long tons (52.28 t; 57.62 short tons)
Prime mover	English Electric 6K
Traction motors	English Electric, 2 off
MU working	Not fitted
Train heating	None

Type and origin
Type and origin
Power type	Diesel-electric
Designer	English Electric
Builder	Hawthorn Leslie
Serial number	HL: 3841–3850, 3816
Build date	1934 (7079), 1935 (7069-78)
Total produced	11

British Rail Class D3/6
British Rail Class D3/6
	7069 undergoing restoration
Power type
Type and origin
Power type	Diesel-electric
Designer	English Electric
Builder	Hawthorn Leslie
Serial number	HL: 3841–3850, 3816
Build date	1934 (7079), 1935 (7069-78)
Total produced	11
Configuration:;
Specifications
Configuration:;
• Whyte	0-6-0 DE
• UIC	C
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Wheel diameter	4 ft 0+1⁄2 in (1.232 m)
Loco weight	51.45 long tons (52.28 t; 57.62 short tons)
Prime mover	English Electric 6K
Traction motors	English Electric, 2 off
MU working	Not fitted
Train heating	None
Maximum speed
Performance figures
Maximum speed	30 mph (48 km/h)
Power output	Engine: 350 hp (261 kW)
Tractive effort	30,000 lbf (133.4 kN)
Operators
Career
Operators	London, Midland and Scottish Railway,; War Department,; British Railways
Class	LMS: 0F; BR: D3/6
Numbers	LMS 7069–7079;; BR 12000–12002
Axle load class	Route availability 5
Retired	1940-1962
Disposition	One preserved, remainder scrapped

The British Rail Class D3/6 were diesel shunters designed in 1934/5 by English Electric for the London, Midland and Scottish Railway. (LMS)

Prototype

Between 1931 and 1934, the LMS ordered nine prototype 0-6-0 diesel shunters of different designs. The last of these was based on the English Electric 6K of 300 horsepower (220 kW) diesel engine, with a long bonnet ("nose"), 0-6-0 wheel arrangement, EE 6K prime mover and two axle-hung traction motors. It was built by Hawthorne Leslie to English Electric design.^[1] Similar prototypes were later built for the Southern Railway (SR1-3), Great Western Railway (GWR2), and London and North Eastern Railway (8000-8004) and this configuration was repeated in most subsequent large diesel shunters built in Britain, such as the British Rail Class 11 and even more numerous British Rail Class 08 that entered service after World War II.

After modification and uprating to 350 horsepower (260 kW), the prototype was taken into LMS stock in 1936 and numbered 7079, (later British Railways number 12002. It was withdrawn and scrapped in 1956.^[2]

Production series

Ten further locomotives of the same design, with minor alterations and uprated to 350 horsepower (260 kW), were built in 1935 and taken into LMSR stock in 1936. These were numbered 7069-7078 by the LMS. Three of these later became British Railways numbers 12000–12002 (previously 7074/76/79 respectively). They spent their working lives allocated to Crewe South Locomotive Depot.

The remainder of the class were sold to the British War Department in 1940 and were shipped to France during World War II. Of these, the first production locomotive, No. 7069, survived the war and was used in industrial service in France. It is being restored at the Berkeley Vale Railway.^[3]

Footnotes

^ Strickland, David C. (September 1983). Locomotive Directory: Every Single One There Has Ever Been. Camberley: Diesel and Electric Group. p. 48. ISBN 978-0-906375-10-5. OCLC 16601890. OL 27959920M. Wikidata Q105978499.
^ Strickland, David C. (September 1983). Locomotive Directory: Every Single One There Has Ever Been. Camberley: Diesel and Electric Group. p. 49. ISBN 978-0-906375-10-5. OCLC 16601890. OL 27959920M. Wikidata Q105978499.
^ "First Locomotive arrives at Sharpness". Vale of Berkeley Railway. Retrieved 26 September 2015.

References

Strickland, David C. (September 1983). Locomotive Directory: Every Single One There Has Ever Been. Camberley: Diesel and Electric Group. p. 48. ISBN 978-0-906375-10-5. OCLC 16601890. OL 27959920M. Wikidata Q105978499.