British Rail Class 01

Specifications
Specifications
Configuration:;
• Whyte	0-4-0DM
• UIC	B-dm
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Wheel diameter	3 ft 2 in (0.965 m)
Minimum curve	1.06 chains (21 m) normal; 1.00 chain (20 m) dead slow;
Wheelbase	6 ft 0 in (1.829 m)
Length	23 ft 8 in (7.214 m)
Width	8 ft 5+1⁄2 in (2.578 m)
Height	11 ft 10+1⁄2 in (3.620 m)
Axle load	13 ft 6 in (4.115 m)
Loco weight	25.05 long tons (25.5 t; 28.1 short tons)
Fuel capacity	325 imp gal (1,480 L; 390 US gal)
Prime mover	Gardner 6L3
RPM:
• Maximum RPM	1,200
Engine type	6-cylinder in-line Four-stroke diesel engine
Transmission	Mechanical: Wilson SE4, 4-speed epicyclic gear box, Vulcan-Sinclair type 23 rigid hydraulic coupling, to a Wiseman 15LGB reverse and final drive unit.
Loco brake	Straight Air
Train brakes	11503–11506: none; 81: Vacuum;

Type and origin
Type and origin
Power type	Diesel-mechanical
Builder	Andrew Barclay Sons & Co
Serial number	395–398, 424
Build date	1956 (4), 1958 (1)
Total produced	5

British Rail Class 01
British Rail Class 01
	A Class 01 at Holyhead Breakwater
Power type
Type and origin
Power type	Diesel-mechanical
Builder	Andrew Barclay Sons & Co
Serial number	395–398, 424
Build date	1956 (4), 1958 (1)
Total produced	5
Configuration:;
Specifications
Configuration:;
• Whyte	0-4-0DM
• UIC	B-dm
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Wheel diameter	3 ft 2 in (0.965 m)
Minimum curve	1.06 chains (21 m) normal; 1.00 chain (20 m) dead slow;
Wheelbase	6 ft 0 in (1.829 m)
Length	23 ft 8 in (7.214 m)
Width	8 ft 5+1⁄2 in (2.578 m)
Height	11 ft 10+1⁄2 in (3.620 m)
Axle load	13 ft 6 in (4.115 m)
Loco weight	25.05 long tons (25.5 t; 28.1 short tons)
Fuel capacity	325 imp gal (1,480 L; 390 US gal)
Prime mover	Gardner 6L3
RPM:
• Maximum RPM	1,200
Engine type	6-cylinder in-line Four-stroke diesel engine
Transmission	Mechanical: Wilson SE4, 4-speed epicyclic gear box, Vulcan-Sinclair type 23 rigid hydraulic coupling, to a Wiseman 15LGB reverse and final drive unit.
Loco brake	Straight Air
Train brakes	11503–11506: none; 81: Vacuum;
Maximum speed
Performance figures
Maximum speed	14.25 mph (22.9 km/h)
Power output	Engine: 153 hp (114 kW); At rail: 102 hp (76 kW);
Tractive effort:;
• Continuous	12,750 lbf (56.7 kN) at 2.63 mph (4.23 km/h)
Brakeforce	15 long tons-force (150 kN)
Operators
Career
Operators	British Railways
Numbers	11503–11506, 81 (departmental); later D2953–D2956; later 01001–01002;
Axle load class	RA 1
Withdrawn	1966–1968 (except D2954–5), 1981
Preserved	D2953, D2956 (1st)
Scrapped	1969, 1982
Disposition	2 preserved, 3 scrapped

The British Rail Class 01 diesel locomotive is a short wheelbase 0-4-0 diesel-mechanical design intended for use in areas with tight curves and limited clearance.

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